Bathmate tends to be a bit too large in diameter to properly accomodate the penis current diameter. That extra skin in between the baffle edge and the penis base tends to pull up the skin, creating a crease under vacuum pressure that feels like a pinch. In reality, it's just the free skin rising up into the
cylinder at the base. When you point the pump downwards with the penis during the pump, you're creating a tighter skin surface by displacing the skin a tiny bit. It's not enough, but just enough to create a bit more comfort.
The X30 has a comfort insert to reduce the amount of diameter around the for this specific reason. If you don't have the insert, my suggestion is not to use that insert but to purchase a universal donut instead. Measure the outter diameter of the baffle and get the thick, the very thick, silicone universal donut for your usage instead. It reduces the size of the diameter, the middle allow expansion as needed, the center riser acts as a
cock ring to increase the blood retention better, and the thick layer of silicone at the base will give you much greater comfort than the comfort insert from
Bathmate. The brothers that use
Bathmate either do this or abandoned it and went with the
MityVac system instead. There are pluses and minuses, but those of us used both for a long while, we would tell you to use the
MityVac each and every time. Since you already have the X30, use it until you can't handle it any more. Invest up and not another
Bathmate.