you would have a hard time finding. Including the trigger pull which on my gun is about 2lb or less. I am not sure just how the tuner did it but you can ask him over at the Fun suppily forum he is Russ Best. I beleave it involved reoplacing of a spring or two and was not overly complicated. My RM377 is now a dream to shoot and I love it. Give Russ a shout or an e-mail at bullsl@aol.com I beleave he can help solve your mendoza problem.
Jim L