"A couple of years ago, I was at Helen's Cycle in Santa Monica and it just happened that Nate Royal was doing a fitting for Sarah Hammer. For those who don't know them, Royal is a pro fitter and Sarah Hammer is a pro rider. Even pro riders occasionally need to tweak their fit to get results. "

BTW, that is Nate Loyal..

I've had several fits by Nate. First one...spot on. Made a big difference for me. Couple of years later, saddle change and returned to him. But after a few visits, still not quite right.

Now I think Nate is an excellent fitter. He is experienced, patient and good to work with. However he is not a magician. So even with someone I've been successful with, results are not guaranteed.

As mentioned above, it's a hit and miss. And it does help to understand what, and why, the fitter is making changes.