The remaining three rotor pulleys are nearly complete. The most time consuming part, the machining, is now complete. Everything went smoothly making the parts, which I was not expecting since this is my first time making these types of parts. Here is a shot of the pulleys together:

After adding the bearings and the flanges to the pulleys, it'll be time again to start re-assembling the vehicle and begin testing again, hopefully before the new year. For the next round of testing, the original set of rotors will be used initially in case something doesn't go right. Once the new pulleys have been tested and shown to work, then the latest rotors will be put on the vehicle.

One other upgrade which may also be done by the next test is adding solid axles with bowed E-clips to hold the rotors in place. The current all-thread axles aren't well suited to their task and the nuts holding the rotors in place continue to come loose in spite of using the star type lock washers. I'm confident the rotors won't need to be adjusted height wise anymore, so it seems to be time to make the upgrade.