Well, it looks like I'm going into the attic. As I feared, Global is too weak for me to receive.
I've got a homemade channel 7 yagi pointed at Watertown, with 6 is coming in from the back. The analog signal was weak, and the picture was quite grainy, but I was optimistic that it would be good enough to pull in the digital signal.
Since the WNYF repeater went up on 28.1 and 28.2,the channel 7 antenna became redundant, so I'll replace it with a channel 6 dipole I built and see how well that works for the digital signal.
Wish me luck,
Josh