I have been casually pumping for a couple years. I would like to make my erection longer after I pump, moreso than thicker. If I use a thinner diameter tube will it force my cock to expand in length? I know pumping is most effective for girth gains. However, it also relaxes the ligaments and stretches the penis up the tube. I am curious to know if there is a more effective way to apply these vaccum forces to target temporary length gains. Specific info about myself: I use a MityVac brake bleeder pump with a 10" x 2.5" tube. I enter erect (7.5" x 6.5") and pack the first quarter of the tube immediately. If I keep my session shorter than an hour I won't pack more than a third of the tube. After pumping for an hour at 5 hg my erection measures about 7.75" x 7.25". My cock is well conditioned for pumping. I am young, athletic, and healthy. I lift weights every other day and I take 2000 mg of L-Arginine daily. As you can tell my cock responds well to girth expansion, but not so much in length. I have read of men expanding an inch or two in length from pumping. I have not experienced such a thing, yet. Maybe they meant that they expand an inch or two in the tube? I am not sure, do any of your erections grow an inch or two in length after pumping? My intention is to make my cock look more like Tony Duncan's cock. I know he used a penis pump to expand his long cock into a huge one. Do any of the experienced pumpers on this forum have any idea what pumping method he used? Did he: - Use a thinner tube to target more length than girth? - Pump at low pressure (~ 3 hg) for very long periods? - Pump at higher pressure (~ 8 hg) for very long periods? I have found that I am more successful in life when I model my efforts after those who have already achieved what I am pursuing. Tony has a naturally long penis, the pump only enhanced that length. I feel my penis is long enough to achieve the same kind of length. I am just going about it in the wrong way, I believe. I want to figure out the most efficient approach. Thanks for taking the time. I understand that I may not receive an answer, and that I might have to purchase a thinner, longer tube to conduct an experiment myself. If that is the case, I will report back here.