I know people say pumping doesn't give length gains but I've been pumping close to two months now twenty min a day and about eight days doing bathmate hydro7 doing four five minutes stretches (pumping until plunger won't go more and holding it) I notice a very great length gain even the next day before I pump I don't know how long maybe almost half of an inch is estimate. I have a question on using electric water penis pumps, how they pump automatically then just repeat well I tried my Amazon one today it was very nice it got to slightly above 17cm. My question is for attempting length gains what is best, very intense repeated pumps likE THIS OR is it better to pump and hold, like in a non electric pump? THANK YOU for any answers and God bless to all