Definitely let us know when you get that spring rate calculator up and running. Maybe we (well, you
but I'd be happy to contribute) could even start a database of springs, with rate, length and diameter, # of coils, etc. Like the other ones you have for motors and dogbones. Many shock springs are rated, but I think even more aren't. It would be nice to be able to compare actual rates, instead of just "the red springs are soft, the blue are medium."