I gave up trying to prevent ball-suckage using my modded X40, so I just gave-in and 'whole
package' pump now. When using the
MityVac, I sized the
cylinder to my MSEG to impart the majority of the force on the length axis and it also makes it impossible for anything but my shaft to fit. You'll get over the discomfort, just take it slowly (if you choose to pump the entire 'family'

)