First time around I tried pumping was long before I found Thunder’s, using a cheap pump without gauge. I’m uncut and my foreskin was “dough nutting” alright. It looked terrible after each set. The dough nut effect has nothing to do with the actual pump quality though, rather the amount of time spent in the tube and the pressure. I pumped at very high pressure, I could barely stand it. I thank God it didn’t kill my dick!
Now I know better. I bought a new pump for more comfort and a gauge. I pump at around 6Hg and for no longer than 10 minutes. After four sessions with some tube milking and jelqing between sets (100 strokes) the dough nut effect is there but it’s hardly noticeable and goes away in an hour or so. I think being uncut makes it almost impossible to avoid but if you’re being careful it will not bother you much. I put a leather cock strap tight around my sack to keep as much skin as possible outside the tube. I guess this decreases the dough nut effect.
Renholder you shouldn’t worry about pumping at all. Just follow the guide lines and you’ll be fine. Besides it is wonderful to actually see your dicks true potential. When pumping you get an idea of what’s coming to you in the near future :)
Best of luck!
/DG