The expansion is okay - it's the "supposed expansion someone could have" speaking always of the mean expansion everyone gets.Look at the expansion instead. Start your session with a snug Acrylic cylinder and go wider on second set. The expansion during, and after session is the most important. Just because you have higher vaccum pressure (past a pointl doesn't mean that you get more expansion.
Most likely you will not see a substantial increase in erected length, but mostly in flaccid hang this is my experience. Almost non increase in erected length outside the cylinder but substantially bigger and longer flaccid hang.
Hope my information helps you.
SIM based on your experience, LengthMaster 3 - Penis Bundle Stretcher & Weight Hanging bundled stretches behind the chicks 10 mins and then Girth program (SRT 5x5x3) will help in length even if it is just 10 mins?
"Click" the link, to buy at MoS Shop.
Follow the link to learn more about: Girth program (SRT 5x5x3).