I wanted to use the nano expansion board for Regis Hsu's spider Robot after finding this design. I made a couple of small changes to allow the MG90 servos to be used. I also added more support for the expansion board and BEC. I added a hole for a switch on the top of the body.
I also had to change the hip part of Regis Hsu's design. https://www.thingiverse.com/thing:2204279. I only modified the coxa-b part for the design then used Simplify3D to create the mirror image parts required. That is why I have not included a coxa-f stl file.
I also created an extra part for a battery holder
Video shows assembled robot. https://youtu.be/wmmPD2v2RAA