If this has been answered elsewhere and I (a real noobie) didn't find it, I'm sorry. I have a new full-size MP40 and would like to know two things. 1. Can the trigger pull weight be reduced and draw shortened? 2, Can a safety be added to it so that I can occasionally use it for concealed carry? I don't in any way want to compromise what is an already fine tool. If either mod is possible, without compromising the pistol, what would be a reasonable charge to pay?