I just got the Celestron Focus Motor installed on my RASA 11 this week and have now had the chance to use it on a few nights. It works great!
I replaced the Feathertouch MicroTouch and Rigel nStep stepper+bracket, which I was having major issues with. It kept missing focus no matter how many different step settings I tried. (I think it was an issue with the focuser sticking more than the Rigel, something may have happened in transit during it's recent trip back from Torrance). In any case, my problem instantly went away with the new motor.
In SGP, I used step size of 100 (9 points) with a backlash compensation IN of 200 steps. I also told it to reverse focuser direction so that it was finishing inwards against the mirror (CCW). Hopefully this will help a few people get started with settings in SGP, though I have no idea if the RASA settings would be close to an Edge. In my experience with the Rigel on the Feathertouch on my Edge 9.25 the settings vs. the RASA 11 were close, however.
It also gets the focus task done much faster than the Rigel nStep. Since this is a servo motor it moves much faster RPM, and it probably also helps that I also use a much smaller step size and backlash compensation here.
It was easy to install even having to put on the RASA 11 retrofit kit. The only downside I can see for imaging is that it doesn't have a temperature sensor in it so you either need another solution or to just focus at a set time interval. It would have been a really nice touch if Celestron had added this. However, I used it as an excuse to order an Astromi.ch Mbox which tracks temp, humidity, and pressure and interfaces with SGP through ASCOM.
I am very pleased with this purchase. A couple images of the focus curve result which has excellent repeat-ability and nails it every time, and the motor installed: