Exactly where is the pinch? My two cents. This saddle, for me at least doesn't wear like any other saddle. From the looks of it your leg loops are way way too tight. When I have the saddle on, like in your picture the leg loops are super loose Could easily fit my hand between the padding and my hamstring. Not a fist but a flat palm. The first time I tried it, my immediate thought was, these things are way too loose. Then, I sat into my line and everything snugged up perfectly when I loaded my bridge. That's the beauty of this saddle. It's unlike the modern saddles of today, being each leg and the waist are independently tightened and adjusted to comfort. This saddle is one living breathing being that adjusts to your anatomy and movements as you move.
Whats your height and weight? I have worn a size one and a size 2. I'm 6'1" 205 and prefer the size 2 belt and size 1 leg loops. From the picture it looks like the side rings are at your pelvic crest and your bridge is so wide. My side rings are just about an inch in front of my hip bones and my bridge is about 6" long.
I cant really tell but it almost looks like you are wearing it kinda high like as if that height gives you the snug feel you think you should have on the leg loops.
I hope that helps a little. Don't expect it to feel like anything you have worn before. It wont. Ill try to take some pics of mine on me tomorrow.
