Minor update but one i think is immensively useful to hobbyists. The pram battery common in macs as old as the macintosh classic to even the emac while hard to find and really fucking expensive (also most of the time nos) is replacable with this simple converter that you can 3d print that converts the battery slot to a cr2032 slot basically making it universal. All you need is a thumbtack, a device to heat up the thumbtack (i used a soldering iron) and the holder I found here https://www.thingiverse.com/thing:5867412 . This, despite not having much of a following should be fucking popping off the charts due to how useful this is in retrospect https://social.076.moe/url/1042804