Spring Design

I recently have been discussing spring design with a fellow named Shredder. While I did this last year I was able to apply some of the concepts i've learned from Machine Design II.

http://www.airsoftretreat.com/forums/index.php?topic=82508.msg808447#msg808447

There are some screenshots of what i was able to do with the data. I'd like to verify the forces with weights to see what force the springs are generating so i can correlate it to the theoretical force generated based on the spring geometry. I'm sure it's off - i just don't know by how much.

Shredder wants to make a 1000 fps airsoft rifle. So naturally increasing spring force is a good place to start. I was inquirying how he made some of his springs and learned that i may be able to do it too!

Here's the reference information:
http://shredderscs.proboards.com/index.cgi?board=projects&action=display&thread=80&page=1
http://home.earthlink.net/~bazillion/tooling.html
http://home.earthlink.net/~bazillion/Coiler/index.html
http://home.earthlink.net/~bazillion/compression.html#tweaks

While researching spring mfg processes, I ran into this useful fellow who seems to be adept at metalworking. He also has some useful tube cutting techniques could be useful for HPV.
http://metalgeek.com/