You didn't mention what the guns use is. If it's a SD piece, I'd leave it alone and just polish it for smoothness. If it's for competition, let a smith do it.
Another thing is, do you benefit from a light trigger? For a long time I couldn't shoot any better with a light trigger than with a heavier one. I didn't even start thinking about light triggers until I saw myself shoot better with a strange gun than with my long time intimate gun with a heavier trigger.
I'd suggest shooting some other guns with light triggers before doing anything to yours.