The part that concerns me is by pulling up on the hammer, you're allowing the engagement surfaces to "roll" off each other. Even when lapping by conventional methods, it's important to keep the edges flat and to not change the angle. Maybe it feels better and will be fine or maybe it'll be unsafe in 500 rounds, only time will tell.
The part I have been trying to convey is good triggers are readily available and fairly reasonable. ALG makes a better standard trigger for around $40 and are proven but even they suck compared to a decent 2 stage trigger. I do understand trying to use what you've got. I have a new 6720 that I'm keeping irons on and would really like to keep the stock trigger but all my other guns have good triggers in them so I know I'll have to change it eventually.
