Design specs and computer generated prototypes were in the works for the Sweetie Bot project way back in July. Since then, her molded form has officially been 3d printed, with the new one shown up above at Derpfest 2017.
They have some new schematic and general movement updates over on their website now, showing off how joints work and the internal electronics. I think this might be one of those rare major projects that sees completion in this fandom!
Thanks to ryan for sending it.
