I've not been able to find written instructions on how to adjust an L57 trigger. I've attached a scan of a page from my 1958 and 1960 FI catalogs that show the trigger, but without instructions. I've been studying an L57 trigger to determine how it adjusts and it seems to be different than a #4 trigger. On a #4 trigger the top screw (B) will adjust the pull and the screw directly under it (E) is used to adjust backlash. Of course lock nut (A) has to be loosened to adjust (B). The L57 trigger has 2 screws that are visible on the top picture (with the blue background) of the scan. If I loosen the top screw (the one closest to the bolt) it will slamfire for me. If I reposition the top screw to its original location and adjust the screw under it in or out, it increases or decreases the amount of pull respectively, and I cannot make it slamfire. This seems to be the correct way to adjust the L57 trigger, but before I do it to the actual L57 I want to adjust from a 5lb. pull to a 3lb., I'd appreciate input from you guys. I want to be correct.