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Very tight stars with that sort of load on the Polarie! Some nice detail in the dust lanes too.
With the AstroTrac, I don't even bother with the polar scope - tried once without success. Not enough bright stars at the south celestial pole.
Drift alignment has been the only way for me. Takes about 30-45min to get right though, but accurate. Yes, the payload does make a lot of difference though. I normally drift align using a 70-200 f2.8 (heavy lens) + 2xteleconverter and trying to minimize axial moment load, which affects the tracking rate. And, yes, having a heavy load will distort the whole system, so need to allow some small compensation (about 0.5deg) for north/south vertical alignment when a lighter lens is to be used.
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