Well the old gunsmith cure is to cut turns off the hammer spring. But you at the very least better have a spare spring just in case. I have a CZ70 and the trigger DA was awful. I trimmed the hammer spring a tiny bit till it was still slightly compressed with the hammer down. I think a turn and a half or so, with a Dremel cutoff tool. Certainly made it lighter but it needs more work for smoothness. Felt good till I put the side plate back on. I wonder if the trigger bar has some interference or what. But modding springs is always at your own risk. That is why it is an old gunsmith trick, instead of an old Billy Bob trick. For something like a range plinker you can take chances, not for your CCW!