Opening:
This week was less about flashy new printers and more about fixing the stuff that makes 3D printing annoying: purge waste, wet filament, and finding models worth the plastic.
Prusa’s eight-tool INDX is finally reaching early users, SUNLU wants to turn the AMS Lite into an active filament dryer, and summer model trends are leaning heavily toward practical prints instead of shelf clutter. That’s a good week.
The 60‑Second Extrusion:
Prusa’s INDX Founder’s Edition is shipping. Standard CORE One/+ conversion kits are scheduled to start leaving Prusa by the end of July, with the first batch targeted for completion by the end of August. Read the Prusa update.
SUNLU is giving the AMS Lite active drying. The upcoming $129.99 AMS Lite Heater is scheduled for July 20 and can dry while printing at temperatures up to 70°C. Read the announcement.
Prusa launched a summer sale. The assembled MK4S is 20% off, the kit is 10% off, and CORE One+ shipping is heavily reduced through July 14. See the official deal.
Thirteen 3D-printed clay reef structures were installed in the Maldives. Their printed microcavities and geometry are designed to help coral larvae settle and grow. See the project.
Model Pulse is in full summer mode. Beach accessories, mechanical fans, fruit-fly traps, water toys, and printable slides are getting the attention—functional seasonal prints are having a moment. Browse the roundup.
Top Stories:
Prusa’s eight-tool INDX is finally reaching users
What happened: Bondtech has started shipping the Founder’s Edition INDX system, and Prusa says standard conversion kits for the CORE One/+ should begin shipping by the end of July. The system now includes a silicone nozzle-cleaning setup, a small purge-waste bin, and automatic tool-offset calibration.
Why it matters: Multi-color printing has spent years trading convenience for piles of purge waste. INDX is making a different bet: multiple independent tools, tiny priming pellets, automatic calibration, and less filament headed for the trash.
Who should care: Prusa users, advanced makers, print farms running multi-color products, and anyone waiting for serious competition in the prosumer tool-changing market.
Extruder Report verdict: The real test starts now: reliability in ordinary workshops, not controlled demos. If early users get consistent tool changes without constant babysitting, INDX becomes much more than another expensive upgrade.
Link: prusa.com
SUNLU wants to fix the biggest weakness of the AMS Lite
What happened: SUNLU’s AMS Lite Heater is designed to add active drying directly around Bambu Lab’s AMS Lite. The announced system can reach 70°C, supports materials including PLA, PETG, ABS, ASA, PA and PC, and adds humidity-triggered drying. Launch is scheduled for July 20 at $129.99.
Why it matters: The AMS Lite is convenient, but exposed filament and humid rooms are not a great combination—especially once users move beyond PLA. A dryer that works during printing could be a genuinely useful upgrade rather than another desk accessory.
Who should care: A1 and A1 mini owners, PETG users, anyone experimenting with nylon or other moisture-sensitive materials, and makers in humid climates.
Extruder Report verdict: The idea makes sense. The important questions are temperature consistency, noise, condensation management, and whether it improves print quality enough to justify $130.
Link: sunlu.com
3D-printed reefs are going underwater in the Maldives
What happened: The Theyra Maa project installed 13 flower-shaped clay reef structures in the Maldives. The printed layer structure creates small cavities intended to protect coral larvae, while the overall geometry is designed to influence water movement and encourage settlement.
Why it matters: This is a good reminder that layer lines are not always defects. In this application, the texture and porosity created by additive manufacturing are part of the feature set.
Who should care: STEM educators, sustainability-minded makers, large-format printing fans, and anyone who needs a better answer when someone asks, “What is 3D printing actually useful for?”
Extruder Report verdict: It is visually strong, technically interesting, and a useful example of designing for the characteristics of additive manufacturing.
Link: rrreefs.com
Trending Models:
Boomerang – This is a print-in-place boomerang, that flies fast circles and comes back in under stunning 5 seconds! Low weight for fast print! printables.com.
Super Loud 6 Tone Whistle - Thunderstorm V4 – Welcome to the definitive evolution of the legendary V3! The Thunderstorm V4 is not just a simple whistle, but a concentration of acoustic engineering redesigned to be the most powerful, shrill, and wicked Print in Place whistle you have ever printed makerworld.com.
Realistic Feather Folding Fan – This is a realistic 3D-printed feather folding fan featuring finely detailed feather textures created through carefully optimized slicer settings. For the best printing results, please do not modify the included print profile or slicer parameters, as doing so may reduce the quality of the feather texture. makerworld.com.
Aesthetic Fruit Fly Trap – Most fruit fly traps are… well, ugly. So I designed one that actually looks good — a sleek, modern, minimalistic fruit fly trap you won’t mind keeping on your kitchen counter. makerworld.com.
Deal Pulse:
Prusa’s Flash Summer Deal is the cleanest deal of the week The headline offer is 20% off the assembled MK4S, with 10% off the MK4S kit. Prusa is also offering reduced CORE One+ shipping: $17.99 for the assembled machine in the U.S. and free shipping in Europe. The promotion runs through July 14. prusa.com
Community Pulse:
A trending model is not automatically a trouble-free model
The BreezeBuddy comment section is a useful snapshot of the messy reality behind trending prints.
Some users report locking gears, weak parts, or disappointing airflow. Others say higher infill, proper dimensional calibration, and light lubrication helped their prints work correctly. Even the designer acknowledges there is room for optimization. makerworld.com
Print Farm Note:
Seasonal utility is a signal. A trending STL is not automatically inventory: The current summer trend is worth watching: umbrella tables, bug traps, beach accessories, and outdoor toys solve immediate seasonal problems. That is generally a stronger product-testing signal than cloning the fiftieth generic articulated animal. 3dnatives.com
But check the license before adding anything to a sales queue. For example, the BreezeBuddy page uses a Standard Digital File License that restricts selling the digital model or physical prints without permission, while the page separately points users toward commercial licensing.
Final Layer:
The most interesting trend this week is that multi-material printing is becoming an infrastructure problem instead of a color-count problem.
Prusa is attacking tool changes, calibration, and purge waste. SUNLU is attacking filament moisture. Those are not glamorous problems—but they are exactly the problems that decide whether multi-material printing becomes an everyday production tool or stays a really cool demo that fills a trash can with plastic.
My bet: the next winner in consumer 3D printing will not be the machine with the most colors on the spec sheet. It will be the system that makes those colors cheap, dry, reliable, and boring to use.