Fizik originally developed the Arione just for Gilberto Simoni, because he likes to ride way forward on the flats and way back on the climbs and wanted a long flat light weight saddle. One lab test saddle had no covering, just a clear form so they could beam an ultrasound up thru the bottom while Gilberto was on it, on a trainer. Another saddle was totally covered in temperature and pressure transducers. And that was just the start. This and other technologies exist, that can design the optmum saddle for an individual, but are not yet practical for the mass retail consumer. Until then, it would be nice if there were companies that rented out saddles to evaluate, at a reasonable cost. An orthopedic surgeon in our club, gave a talk, with X-RAYs & MRIs, about the tremedous variations in humans, in the area that contacts a saddle. There is a saddle out there that best suites you. Unfortunately, trial and error is too expensive and time consuming for most. Which leaves too many people with a compromise, although they might not even know it.