Hey guys. I was looking at purchasing one of these. I'm ab 6" long girth maybe 4.6. I am doing a routine with manual stuff. The problem is I curve to the left. In normal pumps this is a problem. I was wondering if I should get the biggest one available so that this doesn't happen. I guess I need to compare to the size of the pump I used. But I would rather get a larger one and be able to use it then be stuck with something I can't. Any info is appreciated. Thanks!