How accurate are the timing marks on the motiv 17.5 motors? I do not have a motor checker. I bought the motor used and it required disassembly for repair (broken solder connection of the B solder tab to the stator). Luckily I solder for a living.
I bought the high rotor for the motor (thanks Alex @ Gripworks), and was surprised to see that it is only marginally stronger than the mid rotor (1621 vs 1680). I guess every bit helps. :P Nice to see the motors are being offered with the high rotor installed already. Saves $53.