Taylor is dead on, there is no need to do anything special since the travel is probably less than .050. I likewise use .040 brass for this application, but from the point where the edges of the brass leave the outside of the stock, I thin the brass to approximately .020. I just grab the toe plate with a pair of vice grips and set it down on the end of my belt sander from where it curves inward and grind away about half the thickness. It seems to make the mechanism easier to activate. Ron