I've done the "T"with my arms and the math said I had a 30" draw. But yet when properly measured at the bow shop (long bow with a pre-measured dowel rod in 1/2" increments permanently attached to the string), the bowshop accurately measured me at a 29" draw. So, I'm a 29" draw...

Bama44, find a bowshop or reputable sporting goods store with an archery section, and get measured. They'll probably have the longbow with the dowel rod sitting around there to measure you.