Yeah I know One hour in the bathmate will result in alooot of fluid retention, but one of the biggest gainers I`ve heard of, Big Girtha from thundersplace has gained 2 inches in girth, and he said that his routine consisted of 1 hour of pumping and then 3x10min of clamping, and has said that this routine is what has made him gain so much. So I`m going to give 1 hour pumping a try.
I do however take 10-20 seconds of rest every 5 min by just releasing the pressure in the bathmate, which prevents blisters and give my penis a little break.