I just purchased the Celestron Focus Motor myself and spent the better part of yesterday installing it on my Celestron 8" SCT. As you can see from the photos there was a surprising amount of clearance between the orange base plate/focus motor and my large Canon 60D camera. I thought it was going to be a problem but it worked out well. I downloaded the Focuser ASCOM Driver from the Celestron website and installed it on my Windows 10 laptop.
The problem I had was in the calibration. The calibration couldn’t get the focus shaft to turn the 60 revolutions that is common to the 8" SCT. After working the issue for half a day and calling Celestron support they suggested I extend the focus shaft as far from the OTA housing, remove the grease and replace it with 3 in 1 oil. Also look for damage on the long screw that the brass focus knob threads onto. After all of that I finally decided to look into the front of the OTA through the glass plate and moved the long screw to see if there was an obstruction. Sure enough, there was a threaded screw that was impeding the movement of the primary mirror. The longer screw was used to hold my original finder scope base. Once I removed the screw the calibration worked fine.
I also had some minor problem with the allen wrench screws that secure the focus motor housing to the focus brass shaft. Make sure they are tightened all the way down.
Using my neighbor’s roof I was able to ensure the hand controller worked to focus on the roof tiles.
Due to the cloudy weather here in Bend OR, I haven’t been able to test the focus motor on some real stars so I’ll have to be patient.
If there’s anyone else who has successfully used this focus motor with SGPro please let us know what focus settings worked best for you.