I've been pretty excited about this project, but haven't posted anything because I didn't know how well this would print out. But, today I received my first printed prototype and I think it worked well enough to continue developing these. This is just a base form of the tallest human, which I believe would be Sparkplug. I didn't want to spend a bunch of time modelling clothes and features (without knowing how assembly would go), so it's essentially a mannequin to test the joints. The shoulders worked out perfectly, as well as the ab crunch, but I think I'll be ditching the elbow joints and making the arms one solid piece, and the hips and knees need some work - they barely stay together. After some tweaks, I think I'll try some different materials. This gray/black plastic is very strong, but also a little too grainy for small detail. Scalewise, I think I'm right on the money. Though I couldn't find any screenshots, and I haven't yet installed Photoshop on my new PC to access my reference art file, Sparkplug generally stands as tall as the bottom of the detail on Optimus's shin, above the vents in his shin. To be in that ballpark for MST's OP, the number I came up with for height was 32 mm. So, who would be your must-have people?