g_day
Thanks for that info.
I can go upto 4-5 minutes unguided. Spend some hours drift aligning, taking appart the EQ6, cleaning, adjusting bearings, worms and gears.
The only thing now is atmospheric seeing/turbulance and fluctuating power. Am seriously considering something to give me a constant mains power input. Must talk to my electronic expert
If you have your mount permanently mounted on a pier and reasonable drift aligned to the SCP I can not understand why you have so much drift with autoguiding. The Tarantula is not that far of the SP, circumpolar, which should give you very little drift even with a badly aligned mount.
Are you sure you don't have a balance problem somewhere ?