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Supercharge Your 3D Printer With This Must-Have Upgrade

The new Revo Six hot end from E3D is an easy way to swap in different nozzles on your 3D printer.

Almost all the best 3D Printers can be upgraded in some way with new parts and accessories. One of the most important potential upgrades is to the machine’s hot end assembly, which controls the temperature your printer prints at, and houses the nozzle that helps determine the filament flow.

The Rapidchange Revo Six is a replacement hot end for your 3D printer. It’s from E3D, a company that’s been making parts for 3D printers for years and is one of the gold standards, especially for nozzles and hot ends. This new model has really changed how I use my 3D printers and how I think about the models I’m making.

With the Revo Six, you can swap out the nozzle part of a printer’s hot end easily, which allows for lots of variation in the materials and line thickness for your project. Normally you need to remove the filament from your nozzle, heat the nozzle to loosen the threads, undo it with a socket wrench while it’s hot, then let it cool. After that, you can install your new nozzle, but you need to install it cold, then retighten it once it’s hot. 

The $93 Revo Six (£77 GBP) takes out a lot of steps by making the nozzle and other parts of the printing assembly one piece and fully removable by hand. Take out your filament, immediately unscrew the nozzle, and swap it out. This saves a lot of time when replacing nozzles that’ve worn out, but the real magic is swapping different-sized nozzles for different models.

Why you want different nozzle sizes

Revo nozzles in a little mount connected to a Prusa MK3Revo nozzles in a little mount connected to a Prusa MK3
James Bricknell/CNET

Often the purpose of your 3D model dictates the settings you’ll use to print it. When printing something delicate with a lot of details, you need a smaller nozzle diameter. With something structural that requires strength, you need a larger diameter. Most 3D printers come with a 0.4mm nozzle as standard, which is fine as a happy medium but won’t always be enough in either direction.

The genius of the Revo Six is the ability to change nozzle sizes almost on the fly. Each nozzle size is color-coded and available from 0.15mm all the way up to 0.8mm and can be replaced in less than a minute. The $89 kit comes with a 0.4mm nozzle but the $139 fully loaded kit has four nozzles ranging from 0.25 to 0.8mm.

I’ve printed a set of brackets for a machine I needed to mount to the wall. The mount is completely hidden and layer lines don’t matter, so I used the 0.8mm nozzle to print extra thick, extra strong parts as quickly as possible (larger layer lines mean faster printing too). As soon as I’d finished the brackets, I immediately swapped the nozzles on the Revo Six to the 0.25mm one and started printing a Flower Dragon with tiny details from Fotis Mint. Having that flexibility in a single machine is fantastic. It saves money on different printers and, more importantly, saves me time, something I have very little of day-to-day.

Upgrade the upgrade with the E3D Obxidian

Two long stemmed 3D printer nozzlesTwo long stemmed 3D printer nozzles
James Bricknell/CNET

Like all good 3D printing accessories, even the Rapidchange Revo V6 can be upgraded. Not only did E3D produce low-cost replacement nozzles for all the different sizes you might want, they made a specialty nozzle for the exotic filaments too.

The Obxidian (pronounced obsidian, like the rock) is a nozzle from E3D that’s specially designed to help combat the wear and tear you get from using abrasive materials infused with other mediums, such as wood or carbon fiber. It’s made from copper, rather than a brass alloy, and has a special coating that helps move the fibers through the nozzle without sticking. It’s also designed to work with the Revo system for quick changing.

Buzz phrases like «the last nozzle you’ll ever need» feel hyperbolic, but at the same time, the longevity of the $59 Obxidian compared with standard nozzles — it can last indefinitely as long as you aren’t using glow-in-the-dark filament at high speed — makes me wonder if it’s even worth buying a standard Revo nozzle again. Actually, the Obxidian comes only in 0.4mm and 0.6mm diameters, so it’s worth having the other nozzle sizes around for other print jobs. Filaments with other materials in them — wood or carbon-infused PLA for example — benefit from a high flow rate, so larger nozzle sizes work better for the Obxidan. For standard prints, though, the Obxidian has everything covered.

An accessory that elevates your entire machine

All the best 3D printing accessories improve your experience in some way, but the Revo Six coupled with an Obxidian nozzle will fundamentally change how you print. Because so many manufacturers have used the E3D V6 hot end in some fashion, the company was able to create Revo Six systems that are easy to replace on a huge variety of 3D printers. From Creality to Prusa, E3D has Revo to help you convert. 

I’m convinced that the Rapidchange Revo Six is the next big change to hot ends moving forward, and though I haven’t managed to convert all my 3D printers, if you have just one or two, then investing in a fully loaded kit is well worth it.

Technologies

Today’s NYT Strands Hints, Answers and Help for Nov. 27 #634

Here are hints and answers for the NYT Strands puzzle for Nov. 27, No. 634.

Looking for the most recent Strands answer? Click here for our daily Strands hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections and Connections: Sports Edition puzzles.


Today’s NYT Strands puzzle has a holiday theme. Some of the answers are difficult to unscramble, so if you need hints and answers, read on.

I go into depth about the rules for Strands in this story. 

If you’re looking for today’s Wordle, Connections and Mini Crossword answers, you can visit CNET’s NYT puzzle hints page.

Read more: NYT Connections Turns 1: These Are the 5 Toughest Puzzles So Far

Hint for today’s Strands puzzle

Today’s Strands theme is: With gratitude.

If that doesn’t help you, here’s a clue: Today’s the day.

Clue words to unlock in-game hints

Your goal is to find hidden words that fit the puzzle’s theme. If you’re stuck, find any words you can. Every time you find three words of four letters or more, Strands will reveal one of the theme words. These are the words I used to get those hints but any words of four or more letters that you find will work:

  • MALE, MALES, DIAL, THEY, HONK, WRIT, ENDS, HEAL

Answers for today’s Strands puzzle

These are the answers that tie into the theme. The goal of the puzzle is to find them all, including the spangram, a theme word that reaches from one side of the puzzle to the other. When you have all of them (I originally thought there were always eight but learned that the number can vary), every letter on the board will be used. Here are the nonspangram answers:

  • FOOD, LIFE, FAMILY, FRIENDS, HEALTH, WORK, COMMUNITY

Today’s Strands spangram

Today’s Strands spangram is THANKFUL. To find it, start with the T that’s five letters down on the far-left row, and wind up and across.

Toughest Strands puzzles

Here are some of the Strands topics I’ve found to be the toughest in recent weeks.

#1: Dated slang, Jan. 21. Maybe you didn’t even use this lingo when it was cool. Toughest word: PHAT.

#2: Thar she blows! Jan.15. I guess marine biologists might ace this one. Toughest word: BALEEN or RIGHT. 

#3: Off the hook, Jan. 9. Similar to the Jan. 15 puzzle in that it helps to know a lot about sea creatures. Sorry, Charlie. Toughest word: BIGEYE or SKIPJACK.

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Technologies

Google’s Pixel Buds Pro 2 Just Hit a New Low of $134 in Amazon’s Black Friday Sale

We’ve never seen these earbuds fall this low, but we don’t expect this deal to last for long.

If you’re in the market for a new pair of earbuds this Black Friday, now’s your chance to get them. We’ve found a great discount on the Google Pixel Buds Pro 2 thanks to the Cyber Week festivities. They’re among the best wireless earbuds as our top pick for Android users and, at just $134, they’re a bargain to boot.

That’s a new low for these earbuds, but do be aware that it only applies to the moonstone color currently. That could change at any moment, though, so make sure to check the price of the other colors if moonstone isn’t your thing. Either way, we don’t expect this price to last for long, so order sooner rather than later. 

The earbuds provide noticeably improved sound quality and noise cancellation compared to their predecessor. They’re built with Google’s powerful Tensor A1 chip and designed to offer rich, immersive sound. It’s the first time a Google Tensor chip has been featured in any earbuds and the result is robust active noise cancellation and advanced sound.

The Google Pixel Buds Pro 2 earbuds deliver deep bass with their built-in 11 mm drivers and a new high-frequency chamber for smoother treble. CNET’s audio expert David Carnoy noted that compared to the original Pixel Buds Pro, «there’s more depth and richness to the sound with better overall definition and extension.» Read his full review of the Pixel Buds Pro 2 to get the full lowdown.

These buds also got a design upgrade, with Google making them 27% smaller and 24% lighter to securely fit even more ear types. If you want to wear them during workouts, there’s a twist-to-adjust stabilizer to help lock your earbuds in place while you’re moving around and sweating.

There’s also a conversation detection feature that pauses your music and switches your earbuds to the transparency mode if you start talking. And with an impressive 30-hour battery life, you can listen to all your favorite songs, audiobooks and podcasts for hours on end without having to recharge.

Why this deal matters

At $134, these earbuds are a great buy thanks to advanced active noise cancellation, impressive sound quality and a lengthy battery life. The current deal makes the Pixel Buds Pro 2 earbuds cheaper than ever. But the deal won’t be around for long, so act fast if you want to take advantage of this awesome discount.

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Technologies

Apple Desperately Needs to Launch a Foldable iPhone Flip Next Year

Commentary: Apple is the only major phone company without a folding phone. That needs to change in 2026.

Apple’s iPhone 17 came and went and while we certainly love the iPhone 17 Pro and its vibrant cosmic orange color, I can’t help but be disappointed that the long-rumored foldable iPhone Flip wasn’t part of the company’s September launch event. Most Android phone-makers, including Samsung, Google, Motorola, OnePlus, Xiaomi and Honor are multiple generations into their own folding phone lineups, and it’s beginning to feel like Apple is late to the party. That might be a problem. 

Apple dominates in the premium phone category, but foldables — which fit into the premium space in terms of price — are already nipping at its heels, with Motorola telling CNET that 20% of customers buying its Razr foldable jumped ship from Apple. Meanwhile, Samsung is in the seventh generation of its Flip and Fold series. As Lisa Eadicicco discovered during a visit to Seoul, «foldables are everywhere» in Samsung’s home country of South Korea.

With nearly every major Android phone-maker entering the foldable market, Apple risks losing potential customers. It also runs the risk of letting a rival like Samsung become the go-to name for foldables, which could make it harder for Apple to make an impact if it eventually launches its own device. Furthermore, early adopters drawn to foldable tech may be too entrenched in the Android ecosystem by the time Apple’s phone arrives to want to switch to iOS.

Apple is unlikely to be worried. It’s estimated that around 20 million foldables from all manufacturers were sold worldwide in 2023, while Apple reportedly sold 26.5 million iPhone 14 Pro Max handsets in the first half of that year alone. In 2024, foldable sales were flat — and 2025 isn’t fairing much better, according to analysts at CounterPoint Research, although Samsung did report record numbers of preorders for its latest foldable. Clearly, Apple feels it has yet to miss the boat.

Apple has always found success in biding its time, observing the industry and launching its own take on a product when it’s ready. Apple didn’t invent phones, tablets, smartwatches or computers, but it found ways to take existing products and make them more useful, more valuable in day-to-day life and — dare I say — more exciting. It’s why the iPhone, iPad, Apple Watch and Mac lines dominate the market today. 

For me, I need to see Apple’s take on the foldable phone. I’ve written before about how disappointed I am in foldables. I’ve been a mobile reporter for over 14 years and phones have become increasingly dull as they’ve converged to become slight variations on the same rectangular slab. 

Read more: Best Flip Phone for 2025

Foldables promised something new, something innovative, something that briefly sparked some excitement in me, but several years in, that excitement has dwindled to the point of being extinguished. They are fine products and while I like the novelty of a screen that bends, they’re not a revolution in how we interact with our phones. Not in the way that the arrival of the touchscreen was when we were still pushing buttons to type out texts. 

I did hope that Google’s Pixel Fold would be the phone to catapult the foldable forward, and while the recent Pixel 10 Pro Fold — the second generation of Google’s foldable — does offer some great updates, it still doesn’t offer any kind of revolution. Instead, it feels more like a «me too» move from Google. Ditto for the OnePlus Open. So I’m left instead to look toward Apple, a company with a track record for product revolutions, to create a new take on the genre that genuinely drives forward how we use our phones. 

That innovation won’t just come from the product design. Apple works closely with its third-party software developers, and it’s that input that would help a folding iPhone become genuinely useful. My biggest complaint around foldables right now is that while the hardware is decent, the devices are essentially just running standard versions of Android with a handful of UI tweaks thrown in. They’re regular phones that just happen to bend. 

Few Android developers are embracing the folding format, and it’s not difficult to see why; the users aren’t there in sufficient numbers yet to justify the time and expense to adapt their software across a variety of screen sizes. The multiple folding formats already available mean Android foldables face the same fragmentation issue that has plagued the platform since the beginning. Android-based foldables are simply a more difficult platform for developers to build for than regular phones. Apple would be able to change that, as it proved with the iPhone and iPad. 

Given Apple’s close relationships with top-tier developers — not to mention its own vast developer team — I expect an eventual Apple foldable to offer innovations that make it more than just an iPhone that folds in half. 

And I truly hope it does. I want to look forward to tech launches again. I want to feel excited to get a new gadget in my hands and feel that «wow» moment as I do something transformative for the first time.

In short, I don’t want to be bored by technology anymore. Apple, it’s over to you. 

I Took 600+ Photos With the iPhone 15 Pro and Pro Max. Look at My Favorites

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