The only thing that bothers me about having triggers worked on is when it comes time to use your firearm defend your life, a prosecutor may attempt to use it against you claiming that "Your gun wasn't deadly enough as is, you had to make it more so." is it a stupid argument? yes. just throwing that out there. A lawyer I know who specializes in defending citizens who use firearms in self defense recomends everyone carry a pink gun, so when the prosecutor holds it up and says "ladies and gentlemen, the murder weapon," the jury sees something other than an instrument of death.
BTW, I can't wait for the parts to arrive so I can have my hammer, sear, thumb safety and trigger upgraded on my 1911.