Pointlessly complex gear device

I was looking for something to impress my brother-in-law for Christmas. He always seemed inordinately pleased with the gear systems I had given him before, so I was looking for something more elaborate. I liked the asymmetric planetary gears by faggahz, and the eccentrically cycloidal drive model by otvinta3d, but neither seemed to quite do it. So of course the logical thing to do is to connect them together. I made extensive use if the customizable involute spur gear by artanian and would like to say I made it through logical design processes and that it worked perfectly the first time, but that would not be correct. So exactly how much of this did I do? I designed the transmission and the support structure, both of which I thought came out pretty well.

I of course designed this to print on my machine, which does outside measurements pretty well, but tends to make inside measurements a little small. Since the tolerances on everything are a little tight, you may want so subtl