The bad news is the robo-nanny is expensive. The good news is it stays useful even when you no longer have anyone for it to nanny (mossa)[Emmy the Nandroid]
Printed the “inverted” design by u/OldDepth1294 and have done some sanding of it already to smooth it out a bit. Pic taken while locked in a ringless cage I’ve printed previously that is locked to my PA (the locking pin on the lock is also 3d print