Found this thread a few days ago so I figured I'd register. rofl
Bought a [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]Herc[/words] a few weeks ago but was having problems with the valve pretty early. Would lose all suction after about 3 pumps.
Then I saw this about the Vacuvin so I went out and got one. Of course with the new corks I had a miserable time trying to fit it over the valve.
During the ensuing cursing fit and yanking the valve out I noticed that the cork fit really nicely in the hole that the valve used to be in. Since it didn't work well anyway,
I ditched the valve all together.
This is what I came up with.
View attachment 28403
Just tried it today and Holy Shit it's like night and day. Not only is there no pushing the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]gators[/words] against my pelvis, the release is just a flick of the rubber knob to the side.