Hi David,
Actually, there are lots of things I that can be done to make things more efficient
. I've got quite a few enhancements on the way, a major advancement for me is finally acquiring a GOTO mount. At the moment I can only slew in RA, and have to set the startpoint manually although the slewing and camera operation happens automatically.
You are right I create 2 processed images from 6 x 90 second stacks. To answer your question about searching all night the are 2 points to consider 1) how much data can you search practically 2) Whether searching areas well away from the sun are profitable. If I were to search through the night this would lead to about 70 odd search fields, which at the moment would take the entire next day to process and the next day after to search! Remember with a DSLR you end up with very large image files. The other point is that once you venture past 60 degrees solar elongation you are competing against the big professional surveys so chances of success a quite a bit less. IMO the area of sky an amateur should concentrate on is in the region 35-70 degrees from the sun.
Terry