I was in error The mods were published by Larsen Pettifogger. You can find them in back issues of the Cowboy Chronicle but I can never remember which issues.    Pettifogger's mod replaces the flat spring with a Ruger plunger and spring.  You can also replace the flat spring with a wire one. J-bar explains how as part of this thread on the Open Range BBS. There are also a couple of other ways described as well.   Below are links to modifying C&B guns for use in CAS. All ar