Thanks all, for the input. I tried to switch it to my natural waist during the run to see if that helped (i have the one size fits all Amphipod, so I can change the velcro to fit for different parts of the body) but my torso is so short and my waist is so high that the belt is under my arms and annoys me.

What I meant about the overheating is that I just don't like to run with lots of layers on, so I'm loathe to try something like a vest or camelbak. As I said, I do have a hand bottle, maybe I'll try that on the next long run, and if it is annoying I will look into one of the vests. Maybe my local running store will let me run on their treadmill with it to see if it works.