# Key Points from #hplusroadmap IRC Discussion

• Developers discussed a pneumatic wobble motor design suitable for 3D printing, debating methods for creating silicone bladders through either molding or direct extrusion, with suggestions to reinforce them using nylon fiber to prevent delamination.

• The SKDB (open-source hardware database) project saw active development with updates to the "pymates" component, implementing matrix transformations and rotation functions to describe mechanical mating between parts, with code commits adding unit tests for BRepAlgoAPI.

• Participants explored constraint languages for describing geometric relationships between objects, specifically seeking systems to express relationships like "the bandsaw must be perpendicular to the workpiece face" for mechanical design applications.

• A DIY approach to manufacturing equipment was emphasized, with discussions about building CNC mills as starter machines and creating low-cost welders ($15) using microwave transformer parts, with links shared to relevant Instructables tutorials.

• Kanzure described a system for sharing scientific papers (over 40GB from Nature) functioning like "TV but for science," alongside tools being developed to automatically scrape PDFs from academic sites without relying on Firefox/Zotero.

• The group discussed microfluidics applications, particularly their value in highly parallelized systems rather than simple mixing operations, showing interest in advanced manufacturing techniques.

• Cryonics preservation techniques were debated, including the role of cryoprotectants, optimal freezing rates, and methods to prevent ice crystal formation during cooling to liquid nitrogen temperatures.