I had a painful experience last night on my first ride this season using my new b17 imperial. My pain was mainly in the soft tissue reason and I was aware of my perenial area the whole ride. My other saddle, I hadn't even known it was there

I was wondering the same thing (whether the imperial is the problem).

I already had purchased a setback seatpost b/c of a bike fitting with my original saddle. Females have long femurs and often need that setback for proper knee over pedal positioning.

I don't really see a problem with the rails but it could be b/c I already get a good setback with my seatpost. I actually feel like there is a generous amount of adjustment on my rails.

I don't use the laces (yet) b/c I'm still fiddling with location on the rails and find the laces interfere with positioning front to back.

I did find some posts that said the saddle should be level (didn't realize that it is the nose that should be level) but it turns out my saddle had my nose pointed way up during my 20mi ride yesterday. I adjusted it (and will again) and will keep trying it. I want to love these saddles and will give it some time before I give up!