Oops. PVC pipe is sold with a little extra. "2 foot" precut is actually 25 1/8 inches. I also had to verify how deep it actually goes into the joints (11/16, elbow and T, 13/16 cube vertex - different brands probably vary more). So I have some recalculation to do for the upright, then some cutting
To open the MPJA screwdriver, push the two metal posts which are close to where it connects to the battery-motor (dark gray) body.
I'm also waiting for an H-bridge.