Hi Josh,
Well, you have a lot of input here! Why not take very short unguided exposures and check this out? Wouldn't that just eliminate one complication? With a mount like yours and good PA you shouldn't see anything except round stars in 5 sec or so! Obviously then if you don't see the error it leads back to guiding, no?
Perhaps a statistical analysis using CCDInspector would help by comparing aspect ratios at different points in the sky (with short exposures). With everything secure you probably shouldn't see any change in aspect as long as focus is holding while you slew.
Peter
|