Roger,
Are you permanently set up? I would guess you are with an ME! So why not just use a good model + Protrack and forget about guiding all together? With a short FL scope going 5 min ought to be very easy. I can go 5 min without any problem with my TEC180/MEII.
Peter
PS. Are you trying to image with both scopes at the same time? There is a way but it's complicated and would necessitate using AO on one scope. I can post details if you mmight be interested.
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