Suggestions on your image.
you have a guide scope and a DSI, use them... then your polar alignment isn't as critical as the guiding will look after most of it.
Take longer exposures don't be affraid to bump it out to 10 min even longer with auto guiding you will blow the core out but thats when you take reduction images.
PM me and ill give you a bit of information regarding taking some photos.
this is what a 40d, eq6 and 10"sw are capable of doing when guided
http://s700.photobucket.com/albums/w...nal-HQ-AFC.jpg
2x 10min 9 x 2min, 1min, 30sec, 15sec all at iso 200 no darks flats or bias processed in adobe photoshop CS3