I measured the focuser travel with callipers, and in about 29 mm of travel, it moved 5000 steps on the Micro Touch. That is .0058 mm per step. Critical focus zone of the f10 Edge HD 9.25 with 4.3 micron camera pixels is 232 microns. If I have done this right, that works out to 2.32mm divided by .0058mm equals a step size of 400. Seems huge? Step size for my Micro Touch on my ED100 is only 20, and it works flawlessly. I didn't have any luck with that 400 step size setting tonight. Very inconsistent results, no matter what step size I tried, but I had a very light haze of cloud moving through that I think was the problem. I'll try again ASAP, and will shoot for the 2 - 2.5 time the in focus HFR, whatever step size that takes. And I have disabled smart focus. What would be a ballpark figure for HFR for this telescope?