Beware, it'll be shota and hardcore, with some BDSM from some happy customers' feedback! The device has an educational purpose, but may nevertheless be twisted by some users.
Before that, here's a four sides view of the machine. I gave a lot of thought to every details, so believe me when I say it would be functional; but for the engine, I really have no idea regarding how it could work. That's why it's well hidden under the carter ROTFL.
I don't put the pic under a cut as there's nothing nsfw here, unless you look really closely, and even so. Anyway trying to put the ideas into a good 3D view was a lot of work and taught me some good things (about drawing techniques, what are you thinking of?) And for Gods' sake, I even wrote a complete "how to program" section, with codes and all, using the 6 functions and 10 digits kb...!
NB, this was done under Clip Studio Paint Pro, with a Wacom Intuos Pro tablet.
B01# C2# D2# B01# C9# D5# B02# C45# D7# B01# CA# DA##
This sequence's duration is of 5mn, it starts with 1mn of teasing of the anal orifice, followed by 1mn of long-dicking at medium speed, then 2mn of faster rubbing of prostate only, and ends with 1mn of various depth and speed penetration. No ES (electric stimulation) allowed.