When I downloaded the robots, it looks like rivet is missing the upper finger controllers, so can't completely bend fingers.
I saw there were a few versions of the blend file (for different versions of blender); none worked for me. I am using 2.78c.
Maybe I missed clicking some button? (I clicked fingers/2)
(I uploaded an image, but in case it didn't go through, here is the image of what I am seeing)
