I thought I'd upload the solid library I use when I design physical things like cases and enclosures for DIY electronics projects. I've used MCAD quite a bit but ended up writing my own solid libraries for a few projects I was working on. Maybe they'll be useful for you too. Included are 3 files (for now) that cover metric sized bolt generation, some of the more popular development boards, and a wide variety of battery types and sizes. Listed below are the included solids for each file. Additional usage instructions can be found in each scad file. metric_bolt.scad dev_boards.scad arduino_uno arduino_uno_mounting (mounting holes for Arduino UNO) raspberry_p arduino_mega arduino_mega_mounting (mounting holes for Arduino MEGA) Batteries.scad 2cr5 3lr12 4lr44 9v aa aaa aaaa br1225 c cr2 cr1025 cr1220 cr1616 cr1620 cr2016 cr2025 cr2032 cr2430 cr2450 cr11108 cr17345 crp2 d f j lantern lr41 lr43 lr44 lr54 lr55 n powerwheels pr41 pr44 pr48 pr70 sr41 sr42 sr43 sr48 sr44 sr54 sr55 sr57 sr58 sr59 sr60 sr66 sr68 sr69