I've been pumping for about 2 - 3 years now. While I could fill my old pump ( 10 x 3.25) I've been having trouble with the "Enlarger" pump. Its 12 x 2.5. While the width is a little thinner than I am, I was hoping that would help with the improvement of length. But so far I've not had luck. Heh, I got pretty excited about getting it, but it just seems so daunting now. Please, if anyone has some good advice to offer, I would really, REALLY appreciate it.