Dude... F-ING GREAT REPLY. it all makes sense now... I think I may have been confusing the operations of the screws when I was fiddling with it this afternoon. The little screw didn't have much effect until it was almost all the way in... which now makes sense. D'oh
Luckily I did get a range of Idles when I got the carb; 40, 42, 45, 50.
I guess I'll have to try down jetting. (I knew 52 seemed a tad rich)
Again, thank you!!!