The Oak= I think your on the right track here. A 2.5in tube will do good at a 7in base girth.
I do use a kaplen, I have a 2in, 2 1/4in, and a 2 1/2in tube. I always begin my routine in a 2in, then move a my 2.25 in, If Im feeling good enough I go to the 2.5in tube. This really is not nessesary but I do it for comfort.
Oak make sure you get a pump with a guage, this is a must, so you know what you are doing. I got my Kaplen at my local sex shop, the dude even gave me a huge discount. If I was gay I would have had a date!
Start at low pressures, have lube for the tube, and always go in the tube as fully erect as possible, try your best to maintain your full erection the whole time you are in the tube, milking the tube and doing kegels will help you stay hard in the tube. Then after getting out of the tube edge for 15min or as long as you can until you can get up the 15min. If you want your erection quality back try this routine with the pump.
You will do 3 sets total, but first build up to this. The first time you pump just do one set for 10mins, Day 2 one set for 10min, day three 2 sets for 10min, rest one day, and repeat, Day 1 1set x10min, Day 2 1set x10min, day three, 2 sets x10min.
Now you would be ready for the routine.
I like 3 days on and 1 day off approach.
So All three days you would do
3 sets x 10min, and go no higher than 5hg of steady pressure. What I mean steady pressure, you will notice when you are milking the tube the pressure will go up some. its O.K to go above 5hg while your milking.
Then edge for 15mins after each session, and also try to maintain a full erection between sets, all the rest time between sets you need is no more than 3mins. So in this routine your striving to stay fully erect for 1 hour. This will make your erection quality insane. You will be hard as a pole for sexual encounters, and will be able to last as long as you would like. This has worked great for me.
-Crazyed27-