While you may be able to feel "smooth" vs. rough/draggy you really need a trigger pull gauge to determine what your trigger pull weight/effort is vs. what it is after your improvements (parts or polishing).
I have a couple CZs that only got new hammers (not match/competition hammers, just the reproduction spur hammers CZ puts on a sort of commemorative model CZ75 they make. My finger told me the trigger pull was scary low with the new hammer vs. the original ring hammer. The trigger pull ga. told me it was 3 lbs. Exactly 3 lbs. No way, checked it again, 3 lbs. My finger and brain are telling me the ga. is wrong and I checked it two more times and it was 3 lbs. both times. It was so crisp it just felt lighter than it really was. My second use of the same type of trigger also gave me exactly the same trigger pull weight and feel.
You really need to have a trigger pull ga. if you want to know how much your work and parts improve a trigger pull.