I am a new SGP user, but have had great success (100% success) using the following:
C8 with Hyperstar, approx 390 F/L., ASI 294.
I am in the process of changing to
C8 with 6.3 reducer, approx 1450 fl
I have had no success with plate solving using this configuration. I have had no issue plate solving with APT using the same.
I have the focal length correct in the new profile, and have tried several different exposure times for the plate solving.
I am confident I have some setting wrong and would appreciate any advice!