I've done something similar. Used a chain to and ice lock to secure myself to one side of the room, away from tools. I then put on 3D self locking bondage mitts... and wait for the ice to release so that I can reach the tool to let me of the mitts. Lots of fun!
Searched the forums and found this thread first, but have to say I'm amazed that there isn't a lot more content re: 3d printed models for kink than basically this one thread. It's been my experience the venns overlap pretty strongly, usually. I'm sure we've all sunk endless hours into yeggi.com and other 3d model search sites looking for bdsm, bondage, sissy, etc items. I was thinking for self-bondage and other kinks: See something you find interesting, have tried, found there's a value to it? Would be a central thread for sharing them. We could find / share / assist others with searching and for those more talented than others: mod or custom design things for each other? I have zero cad experience but was able to create some basic, printable models using tinkercad.
Would it be a kosher use of the forum to set this up? Any shared interest? Should we just continue on this thread?