I did that. I cut it a couple times to make sure I didn't cut it too big the first time. I cut, pumped, cut, pumped etc., until I got it right. I did that with the
X30, I've grown and now have the
X40. Now I can just increase pressure without worrying about my balls getting sucked in. I'm on length work now so no girth work yet. I didn't like the slits cuz they'll just keep opening more and more.