Just picked up a civilian M9 yesterday, and had a couple questions. First, what's the best way to lighten/smooth out the DA trigger pull? I figure it'll smooth out as it gets used, just don't know if there's a faster way. Second, it came with the torx/hex screws in the grips, Beretta offers slotted screws on their website. Are those a drop in replacement? I figure they are, but it doesn't explicitly say either way. Are there any other modifications that may be a good idea? I will probably pick up a chromed guide rod to replace the stock one, but other than that, I don't know.