Brett.. I used the timer board set for the 7000 rpm test..I don't have anything else that spins fast enough to try higher speeds.

Board # 4 seems to be a failure.. Just built it and there is something wrong with it.. Bad parts placement or something..not sure yet.. did have to move a few components and omit the diode cause my timer board already has it on. Tried tracing the circuit with a logic pen and signals and voltages are wrong.. Oh well... Back to drawing board for #4.

John