I have a 20 gauge CZ Upland model with 28" barrels and DT. The triggers were way too heavy but my gunsmith was able to get them in very good shape. It's a well made gun and I would use it a lot were it not for the fact that it shoots low. Instead of the 60/40 type pattern that I like, it shoots something like 20/80. It mostly stays in the safe.
That's an easy fix, coosa. Just build up the comb. It'll shoot higher. You can do it a little at the time and watch the pattern come up. If it is centered now, right and left, be careful not to build up the side toward your face as you build up the comb height. Some people use large pieces of moleskin and build them up until they are high enough, but they also let it wrap down the side which pushes the pattern left or right, according to whether the shooter is left handed or right handed.
SRH