I added the source for Robot RB V1 too (It was a question in the comments)
When I first made Robot "RB" V2.0 I found out that the axes are a little to short
(or If you prefer: my Printer do a bad Job and make the Hole to small)
I make a Version with different interconnection parts.
But I found out that the right leg brake 4 times on different frames
Finaly I modify the legs and integrate all change in the frame.
Spareparts for Repair V 2.0 Interconnection (Axes) and Bottom Part (thicker Legs)
New Frame V 2.1 with integrated changed parts