So, I tried RA3 out, but really couldn't do what I wanted to with it. I think it might be a little while before I try it again.
In the meantime, new robot:
Back:
Front closeup:
Alternative version with aluminium extenders for a bit more colour consistency, but I don't really like it so much:
Overall a fairly simple design + skin, only about 20 layers between 4 files (one main file, one for the mouth, one for both sets of eyes). Pretty fun to make the eyes, and made use of Sergepatcher with the extender frame.