My 75 B and 85 Combat both had pretty decent triggers from the factory, but they were a bit stiff with the usual camming that the CZ is designed with. Then I installed this GCW kit
https://cajungunworks.com/product/54420-ultra-lite/ in both of those guns using the lightest (black) hammer spring. The trigger pull and force required to rack the slide were greatly improved with the 85 Combat being remarkably smooth and light both double action and single action, the 75 B slightly less so but still very much improved to the point I really have no complaints with either gun. They are both even more excellent now.
I have the same kit in my 75 D PCR except I went with the blue hammer spring because this is also a carry gun. It is much improved, just fine actually, but heavier than the other two.
I also have the CGW lighter hammer spring in my 97 B. Love that one too.
I've fired a number of different ammo brands through these guns without any misfires or malfunctions whatsoever following the changes. I compared the primer indentions and none appear borderline light, even with the lightest hammer springs.
As happy as I am with the light kit above, I'm still considering whether or not adding one of their hammers would be worth it on any of these guns, but will probably try it on one of them just to see -- probably the 85 Combat but frankly I can't see how that one could be very much better than it is now.
If I were you and interested in minimizing cost in effort to improve your gun, I'd try the kit above first. If I were willing to go further, I'd go with a hammer kit too.