IME, don't change the fit. He gave you a good fit and said change out the saddle. So do it! I have a tough time finding a good long ride saddle, say 4 hours plus. I once tried 20 saddles before I found The One. Then I bought three. Should have bought 4. So . . . Try a Specialized Romin and not the Evo. That's probably the saddle that works for most folks. If that gives you sit bone pain, try a Terry Fly. That one's dead flat. Performance has some Terry Fly clones and variations that are inexpensive and worth trying. Performance also has WTB saddles that fit many people.