A conversation came up about various spring rates among cars and manufactures last night. Found a chart this morning from Brian.. It can be a alittle confusing at first, but it really shows the difference between the new red spring on CRC cars, and the "old" red that came on the Carpet knife. For a good mix the AE stuff is on there too.
http://www.slapmastertools.com/spring-chart.php
Shawn.