Love 'em John, i'm still a film fan of sorts, re star trails, area's around the poles are the toughest places to guide on, as everyone will tell you, and need the most accurate alignments as mentioned, give me a nice 45º altitude east or west anyday
dont forget when you travel, to reset your latitude orientation on the mounts polar axis, its surprising what evn a degree diff in lat will make, i should know, we've done that a few times
just a suggestion
