onlyaman, maybe I can help. I’ve used X4 for about 6 mo’s now.
When I first used it I pinched the heck out of the foreskin tightening the comfort straps. OUCH!!! I had to position the comfort straps perfectly over the 2 cylindrical foam pieces (that came with X4 produce). Still, it was a major hassle. Now after I put on the 2 cylindrical foam pieces, I wrap “Ultrasoft Microfiber cloth,” found at Costco, around the foam. It needs to be cut to fit - width needs to cover high & low of the 2 cylindrical pieces of foam. Then when I tighten the strap I can do it fast and never pinch myself any more. It seems to hold fine with the comfort straps as well.
The plastic base piece would dig into my pelvic area and hurt after a while. So now I use foam (I got foam that’s used for wrapping pipes at Home Depot (spongy & dense). It’s comes in a long (3-4’) tubes sliced down middle, black and cheap. I cut a piece out of it, slightly oversized, big enough so base unit sits on it, and cut a hole in the middle that’s slightly less than the base of my penis. I slide it down over my penis to the base, then slide on the plastic base piece. It’s way more comfortable now.
The comfort straps don’t seem to hold tight. The notches slip off all the time. I do know that if the straps get oily, they slip slip way easier, so keep straps clean so they feel almost sticky. I’m still working on an idea to resolve the loosening of the straps. I’ve seen others place a nail through the center of the straps once fitted, but I fear I’m going to destroy the strap, and it’s costly (as you know). If anyone has any other ideas, I’d love to hear them. So I end up having to constantly tighten the straps when they loosen, or slip a notch.
As far as penis slippage, it obviously helps if you have a larger glans. Mushroom heads work better than small glans. One thing I do is jelq right beforehand to get head swell, then tighten the straps. This head swell will help prevent the upper strap from sliding over it. I’ve even heard that this head swell could also quite possibly increase the size of the glans in time, like any other PE exercise. /forum/images/icons/icon16.gif
If you feel you’re stretching the foreskin, not your shaft, it’s because you didn’t pull any loose skin through the base unit (including some of the skin from the ball sack). Once you get the extender fastened on, before extending, you can tug on the foreskin to pull some through base unit. When you adjust the tension, you shouldn’t feel any pull on the foreskin, but if you do, move the extender backward & forward, & pull some of the skin through the base unit.
So again, in order: 1) slide piece of pipe foam cut-out over shaft to the base, 2) slide on the base unit, 3) slide on the 2 cylindrical foams pieces that came with X4 product, 4) wrap ultrasoft microfiber around the 2 foam pieces, 5) cinch the upper unit onto the shaft over the cloth & foam pieces, 6) separate the bottom & top pieces, align the screws and tighten it down, 7) slowly turn the knobs at the base of the metal rods to extend your penis out to desire force.
I apologize for poor technical writing, grammar, & use of words. I wrote this in a hurry & hope it makes sense.