I have 2 keling 270s and 1 keling 387 (oz.) on my Seig X2, even with the motors off the machine (no load) there is a distinct click sound about once every 2 revolutions, is this normal? Also, at 10,000 pulses per 1inch of travel, im getting about 90 in the velocity field of Mach 3 before the motor stalls, is this normal? Thanks guys!