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Hi Chris,
So you are at 1"/pixel native. That's getting up there in resolution. I bet you find a lot of your results are much more pleasing when binned 2x2, it gives a lot more cushion for tracking errors.
PEC sounds like a good idea on paper, but in the field, unless you have a permanent/stable setup, and a good mount, I think you will find the effect of PEC underwelming. Most cheap mounts (I include the G11 on the borderline of this group!) have tracking errors that are not an even multiple of worm rotation - they don't repeat the same for every PE cycle - hence PEC can't fix them. They come from transfer gears, worm bearings and motor shafts for example. Also, when trying to record the PE curve, they contaminate it, so you record the wrong thing and potentially make matters worse! Even once you clear things up with software (see PEMpro for example), something moves mechanically and it behaves differently or you turn off the power to the mount and the zero point of the curve is lost. Very frustrating in the middle of the night!
PEC is useful for making the AG work less, but by itself it is less valuable IMHO.
EB
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