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PemPro is the main thing. You can also use its Polar Alignment feature which is fast and accurate.
PemPro reduces the PE of the mount which is advertised as 7 arc seconds or better. Mine without PEC correction is about 3.5 arc seconds and I have heard that before.
The 300 point model is not essential and pointing accuracy is high without it.
You can create a 30 point model in a matter of 5-10minutes once familiar with everything.
A couple of 30 point t point models would have your Polar Alignment very close so you could do accurate guiding throughout the night.
Of course the longer the focal length the more demanding all this has to be. But the PEC only has to be done once and is stored in the mount in memory.
So don't worry about guiding accuracy as the PMX is very good at that.
I was looking to make it work the best it can.
A large Tpoint model can improve guiding accuracy as it corrects for slow flexures and so improves autoguiding.
Of more importance than a Tpoint model is to use an off axis guider of some type rather than a guide scope.
Greg.
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