I'm not sure any of us really understands what you mean by a "system."
But if you've read the threads, you know that we haven't been able to formulate a good test for saddle shape (T vs. "pear" or wedge). We're stuck on trial and error there.
I'm inclined to think that there should be a formula based on spacing of the sit bones, Q-angle as approximated by spacing of the knees in a neutral standing position, and perhaps external upper thigh circumference. Possibly the distance between the ischia at some point anterior to the tuberosities could be a factor, too. Or the angle of the ischia, as approximated by measuring the distance between the ischial tuberosities and the pubic symphysis.
If you can come up with a test for saddle shape, that would help LOTS. Even a solid, well-documented conclusion whether fleshy parts affect whether a certain shape of saddle will work for an individual, or whether it's based on bony proportions alone, would be a great start.
PS: This site has life-size top views of a large selection of saddles from Selle Italia, Selle San Marco, Koobi, AX-Lightness and Selle SMP, so you won't have to find actual samples of each of those to measure, in those dimensions, at least. But for other saddles - and for vertical dimensions of those - I don't know a similar resource.
Last edited by OakLeaf; 11-04-2010 at 06:05 AM.
Speed comes from what you put behind you. - Judi Ketteler