Purchased one of these Gemini focusers, I am using it on celestron se6 SCT and trying the set up the amount steps I have set it up to 60000 steps I dont know if that is too many or not enough has anyone out there have similar set up also attempting to focus svbony 205 and 6.3 reducer doea any one know the backspace some say 55mm some say 105mm as this cam and focuser are new to me would appreciate some feedback please