# Key Technical and Conceptual Points from #hplusroadmap IRC Logs

• Developers were working on SKDB (Simple Kinematic Database), a package management system for physical objects similar to apt-get but for hardware, which would track dependencies between physical parts and manufacturing processes, with implementation challenges in Python using OpenCASCADE.

• The "wrench-buildable repstrap" project aimed to democratize manufacturing by enabling people to build CNC machines using only common hardware store materials and simple tools, featuring innovative low-cost pillow block bearings made from skate bearings and pipe hangers.

• Participants discussed creating an abstract language/formalism that could translate between human-readable instructions and machine control code (like G-code) for automated manufacturing, addressing the gap between design intent and fabrication.

• The OpenLathe project (http://openlathe.wikidot.com/) was discussed as an example of using concrete for machine building, though it was noted the project had been inactive since 2008.

• Technical discussions included the design of a 3D-printable rotary rolamite bearing, with challenges regarding material properties and suggestions to incorporate nylon fibers into silicone for appropriate tensile strength.

• Participants shared scientific observations about human skin emitting photons in the 500-700nm range, with primary emission peaks at 630-670nm (red) and secondary peaks at 520-580nm (green).

• The group discussed rTMS (repetitive Transcranial Magnetic Stimulation) and its effects on brain function, describing it as "MRI except it's punching your neurons" rather than enforcing optimal brain frequencies.