The next step in (re-)building the quadruped with a full rotation leg was getting all the motors ready.  I had to first install reinforcing rings on 6 of the motors:

Then, I needed to lengthen the power leads on 3 of the motors to serve as the lower leg joint.

Then I had to assemble all the new legs:

I mounted them all to the chassis:

And then re-installed the battery stud and “resting” feet:

Next up, will be actually powering them and getting it to walk!