- Polycaprolactone (PCL) is being explored as an ultra-low-cost DIY material for removable dental prosthetics; Amazon reviews show hobbyists already molding artificial teeth from it, despite concerns that its softness may shed microplastics during chewing.  
- Participants debated the biocompatibility of PCL, noting that its ester bonds hydrolyze into fatty-acid-like metabolites that the body can burn via ketosis, making microplastic ingestion less toxic than environmental microplastics that concentrate pollutants.  
- Composite ideas emerged: 70 % powdered bone + 30 % PCL has been 3-D-printed into resorbable bone-implant scaffolds, and chitosan–PCL blends were proposed as tougher, still-bioresorbable alternatives for teeth or other implants.  
- A side discussion revived interest in vintage mail-order ceramic tooth kits; sourcing modern dental ceramics (zirconia, lithium-disilicate, etc.) from eBay or dental suppliers was suggested as a route for open-source prosthetics research.  
- nmz787_ reported progress reverse-engineering the control software of a Focused Ion Beam (FIB) microscope, unlocking a debug menu and remote-desktop operation, but noted that automated focus/stigmation routines still rely on tedious manual frame comparison.  
- The sandsifter/xoreaxeaxeax CPU-instruction discovery project was cited as an example of elegant reverse engineering that rekindles enthusiasm for low-level hardware exploration.  
- A speculative design session imagined city-scale pneumatic-tube logistics delivering standardized cylindrical food cans (e.g., spiral-wound pizza) and ultimately human-sized pods; tunneling cost and theft risk were identified as key barriers.  
- A link to an open-source phased-array radar project (https://github.com/jonkraft/PhasedArray) was dropped, highlighting ongoing community interest in accessible RF/microwave hardware.  
- The log closed with a pointer to a Journal of Bacteriology paper on co-culture techniques that allow “unculturable” bacterial isolates to grow when a helper strain provides diffusible growth factors—relevant for open-source microbiome engineering.