Why fix what isn't broken? Seriously, if you understand the proper technique for it's mechanics, just leave it be. Guessing it's a shooter so it wouldn't loose a lot of value but it would loose some having the transfer bar system installed. IMO, if one feels the need for the new system, which I have no problem with, buy a New Model. Otherwise it's like taking an original engine, numbered to a classic vehicle and putting in some new fangled engine.