The Rossi 92s have almost a cult following in some circles , prolly cause they are a popular entry level cowboy action gun. The benefit for us is ther are a lot of tutorials on the net to smooth up the action and assorted after market sights springs and parts to help you make the best of them.
On mine the tinkering was smoothing the action and replacing some springs , both sights and drilling and tapping a hole for the tang sight I did nothing to the sear or hammer other than light polishing on sides. You can use it right out of the box I shot a 150-200 jacketed bullets to smooth the bore a bit and also confirm it functions correctly then you can see friction points to help determine what you want to tinker with you don’t reshape you just lightly smooth the rough spots.
In my limited experience it became one of the slicks little lever guns I have used.