Just a thought here - if different Sworks saddles all seem to be giving you issues, maybe the solution is another brand. If the shop/fitter you are going to is totally focused on Specialized, maybe go to another shop and tell them you would like to spend some time there on a trainer trying various other saddles. Your "undercarriage" might really appreciate this research.

We change as we age. In my early 40s the saddles I used to race became near torture. My riding fell way off, until I had hernia surgery and knew I had to gently get back into shape on the trainer - which I also knew was far more demanding of good fit than the road. Went shopping. Came home with last year's el-cheapo; completely different from anything I'd ridden before. A revelation! When I got back on the road, el-cheapo went on my commuter, a high end of the same manufacturer on my good bike (later bikes plural) and my undercarriage is still thanking me 25 years later.