Until reddit shut off the RSS feeds, Geddit (Android app RSS reader for reddit) was very useful to me.
Allowed following of niche/particular subs without drama
Unfortunately, many of those closely focused, well moderated and useful communities continue to exist only on reddit
Yea it isn’t easy to find any specifics on most of the machines, and it’s hard to even figure out which ones have ever had any non-notional progress
But I found these build instructions, with some photos.
https://wiki.opensourceecology.org/wiki/Structural_Power_Cube_Build_Instructions