I have a CZ 75 transitional model that has a CGW ultra-lite kit, and T1 Disconnector. I have polished everything to include the trigger bar lifter spring grooves. I am well versed on the CZ 75, and have done trigger jobs on two other pre-B 75, an SP-01 tactical, P-01, and shadow 2 all have excellent triggers.
Where I am at now is double action is butter smooth all the way through with no stacking, single action is nice and crisp just under 4 lbs. But the double action is 12.5 lbs. I have checked the trigger bar lifter spring tension, and smoothed the inner frame where the trigger bar rides, sides and back shelf.
I am at a loss as to why the trigger pull is no lighter than stock? Usually just the ultra-lite kit makes a huge difference. I only use the blue 13# springs as they have been good enough in the past.
I am going to install a reduced weight trigger return spring toady, but i don't expect any change.
The gun has the old style safety, and no firing pin block. Installing the sear cage is somewhat harder than normal, needs to be pushed down much harder than my other guns to go all the way back into place.
Any ideas would be appreciated.