• A participant is building a fully open-source 3-D printing software stack written entirely in Haskell, capable of going from OpenSCAD design files directly to G-code for printer control.  
• Hackaday was cited for a recent DIY metal 3-D printer project that uses off-the-shelf welding wire as feedstock, highlighting ongoing grassroots efforts to lower the cost of metal additive manufacturing.  
• Discussion of “SRUM” (self-rolled-up membrane) technology previously floated for DNA capture, storage, and release; skepticism was voiced about the lack of a clear functional advantage compared with existing methods.  
• COVID-19 motivated practical suggestions such as designing and printing open-source PAPRs (powered air-purifying respirators) to address shortages of protective equipment.  
• Social implications of pandemic-driven mask and glove adoption were debated: some participants worried that long-term cultural expectations of face covering could represent a social regression, while others emphasized retaining personal choice.  
• A Twitter thread on the historical origin of the bipolar-transistor schematic symbol was shared, illustrating how early physical device geometry influenced today’s abstract circuit-diagram conventions.  
• diyhpl.us wiki commits added transcripts from Stanford’s 2017 “Scaling Bitcoin” workshop (lightning-network economics) and a February 2020 Chaincode Labs talk by Jeremy Rubin on Bitcoin covenants (CTV).  
• Blockstream’s April-Fools press release about “bringing Bitcoin to Mars with the Lava network” was circulated, prompting a brief aside about prior affiliations with the company.