Not sure exactly what your asking, but a decent smithy has really improved triggers for me for less than $50 bucks. A garage hack can really screw up a mdl 99 trigger quickly.

A 99 trigger job is easy if you keep everything square and flush, but at best it will never be a benchrest or varmint gun trigger....adding a trigger stop to the lever frame area will really help as it has a lot of backlash by design....