I assembled a second PCB, this time without first breaking off all the bits of the legs, to see how it will look and feel. I actually had to break off one piece, to get to the USB port.

However, if I'm going to sell those, I think I will break all the bits off, and put it all in a bag. It will be smaller that way, and less fragile.

I still can't decide whether I want to ship with the battery holder and servo headers soldered or not. Having them soldered allows people to more easily assemble it, but makes the package thicker, and makes cable management tricky. If the headers are not soldered, they can cut the servo cables to the right length and solder them directly into the board, like I did with the first prototype:

On the other hand, since the battery holder has its cross-section roughly square anyways, the package has to be pretty thick to fit it no matter if it's soldered or not.