recoil spring

[casinomick]

OK fellas, riddle me this. After many years of being a wanna be smith . I've assembled or should I say collected throughout these years many,many recoil springs for the 1911. And have lost track what tension they are. Is there a tool be had somewhere :confused:

[Hawkmoon]

http://forum.m1911.org/showthread.php?t=16056&highlight=spring+tester

[Gammon]

Brownells used to sell a tester; I bought one. It is not listed in the current catalog.