I managed to take the astrotrac out last night and try out the polar scope align method (aim at star nearby, centre star in liveview, adjust accordingly to SCP).
I managed to get a 50sec shot of Orion Nebula at 200mm. Definitely an improvement! With some minor refinements I'm sure I could get it to 2minutes using this method.
I'll try the ccd drift align next with the astrotrac in test mode. Things look promising
