Finally some exciting news...the foot drives and NPC 2212 motors are mounted together.
I was a little unsure about belt tightness and if it really mattered which way the cog faced...but as you can see, everything is lined up.
The next big "challenge" will be removing the motor and installing the assembly into the foot shell. You can't do it with the motor attached. However with the motor cog tightened into position, it should be just a mattered of loosing the wheel bracket, getting the cog into the belt, snug everything up and tighten away. (Me hopes!)
I took a short video clip of everything mounted up and running....note the jolt/torque when power is applied!