Walthers sent me a new plunger for my site, and also by mistake sent a trigger return spring which they do not want back...I put the wolf spring on my P99 which helped the trigger alot, but would still like a lighter pull. Should I play with the new spring, stretch it out or file around it to reduce gage of wire to make it weaker? This is a "range" gun so my life is not depended on it, but I do not want to screw anything up either, or make it full auto! Any thoughts?