Pump without the rubber to get girth to the base

[Mazzio]

I have venous leak and the reason for that is a week base of the penis. I have used several pumps but with no positive results. I don’t need the pump for the length or girth. I am ok with those. If I pump an use the rubber band that comes with the pump it squeezes the base and does not affect down there. What I do nowadays that I pump a little while with the rubber and then take it away. After that I put the pump against a my skin and push as hard I can. I use some lube on the base. When I pump my dick will not grow as long as with the rubber but it does make the base thicker.

Anu ideas how I could develop this technique? I tried Bathmate but it did not work at all in shower.