Thanks for that. I had suspected as much.
I compiled a good 140 point model earlier in the week, applied a supermodel to it and found I had 19 arcsecond accuracy (as reported by TSX).
Yet I still had trailing stars after 2 minutes. Bummer.
Looking at the PA report when assembling the model, it advised me to raise the mount 6 or so tics. But when I ran the supermodel, it told me my PA was good enough (az) and excellent (alt). So I thought I was mistaken.
I take it that the PA report changes after running supermodel and that I need to check the PA report before applying the supermodel.
I think.... I'd best go and read the manual again.
Pete
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