• OpenCASCADE’s B-rep engine was defended as superior to classic CSG for handling arbitrary STL-like geometry, despite its computational cost; SKDB’s current collision-detection sweeps a brick’s volume along its mating vector, boolean-intersects with existing parts, and measures the resulting “mass” (volume) to flag clashes—currently ~40 s per complex part.

• A low-tech counter-measure brainstorm covered EMP grenades, graphite powder to blind tank optics, stacked 15 kg TNT mines to breach armor, and the possibility that submarines on the ocean floor could survive relativistic bombardment.

• NaroCAD, a .NET-based CAD modeler, is being evaluated for Linux portability via Mono; participants weighed the long-term risks of .NET/Mono lock-in against open-source geometry kernels like OpenCASCADE and emphasized STEP/IGES export as a future-proofing strategy.

• Genehacker2 is generating composite involute gear profiles for printable stepper motors, comparing cycloidal vs. involute tooth forms for printability and wear; a workflow was shared: cycloidal.py → Inkscape → plain SVG → HeeksCAD extrusion, with STL files destined for Thingiverse.

• Kanzure demonstrated a URL-manipulation trick that downloads any ISO standard PDF free from ANSI’s webstore by altering the SKU parameter and began mapping the SKU-to-filename pattern; he also surfaced Homeland Security standards databases (e.g., http://63.241.103.40/) and ANSI public-review portals as potential compliance resources for open-source hardware.