mmm I have used CCDsoft before but it was very basic operation
Maxim runs very well with AO from the two different people i know that run it but as for auto pilot....
As for the SX-LF they advertise a 60mm clear aperature so i would say that you should be alright with a 52mm diagonal of the 16803. I dont own one but yeah the numbers are on the right side of the foot so to speak