Interesting times and a worthy effort.
The memory battery leak damaged the crystal sync for mine. Ken was able to put it right for me.
Do you still get a bit of hunt in the motor speed once the system is pulling film or does it settle?
CPs came with two interchangeable cog pulleys, one for 24fps, one for 25fps. Which of the pulleys is your system calibrated to? People with cameras geared for PAL TV will have 25fps pulleys. Some of those cams have ended up back in the US. Is your system capable of switching references to permit both gears? The motor spins at the same speed with the old governor board for 24fps or 25fps.