Jocko I have asked this question many times and have never received a responce except do it yourself or change springs.I guess the art has died as no one does it anymore.Remember this is a collectors forum and very few members every seriously shoot 03's they just collect and plink with them.
After I wasted quite a few dollars trying to do it myself by ruining triggers I started swapping triggers until I found one that was worth anything.This I use for target practice and matches.
Remember this is a collectors forum and most of them do not seriously shoot but are more informal plinkers and if the trigger isn't horrible it's good enough for them.Not that there is anything wrong with that but they don't understand the type of trigger a good tight position can be appreciated in.
Good luck in your quest.