This will sound negative but I doubt if there are to many people who really care about the why's. I don't mean to sound negative but from what I see from looking about most forums (not just cnc) all people want is to know how to make it work, not the reasons behind how they could figure it out for themselves.
If there were more people like DC about & this sort of question got asked a lot on forums then I would have thought someone would have done something about it before now. Not saying it would be a waste of time to do, just don't think it would get the amount of use some people think it might get.