Don't know what happened to my reply to this thread. Maybe I didn't properly submit it. I'll try again: Keep it simple. Place two compression springs end to end(slipping them on a rod, similar in size to the spring I.D. might be a help). Push them against each other. The one that collapses most is the weaker one. Ditto for extension springs. Hook them eye to eye and pull. The one that stretches most is the weaker.

> Jim Legg <