While I search for the missing parts, I decided that I might as well make an armature to hold everything together.
I intend to add lighting and possibly eye movement to these guys, so having something to mount it all to will be helpful.
1/8th inch thick aluminum was used for the plate. I think that should be adequate to keep everything from drooping.
Here is what I came up with for the Mama robot...
I used some locating posts that were already in the prints as screw bosses.
And here it is screwed in place...
And while I was at it, I made an armature ring for the Pa robot as well. I'll do a build report on him too.