Stepper running at 21 steps and RPM of 875 when water and oil fully hot. Appears to be rock steady but I have yet to go on a decent run to fully test. I marked the original position of the idle screw; I had to move it 1/2 turn clockwise (from the position when bought 15 years ago) to get it down from 55-60 steps to 21 steps which, to my mind, is a lot.