You are all spot on. Because of the angle and the fact that it is plastic/light and gets turned around when mounting,it is easy to bugger up and not get it lined up right. CZ replaced mine when they fixed the gun. If it was slotted, it would be great and easy.
On DA. I find this gun, despite a heavier feeling pull than my SP 2022, is easy to hit with. Yesterday I took my son out and I had no time hitting a chest plate sized gong at 12-15 M in DA. I even fell back to 30 yards and hit it.
I may start a new thread on the pluses and few minuses of this gun. The shape or the trigger, beavertail, and negligible OT make this thing a pleasure to shoot. That gong is addictive.
I cannot express how much smoother my DA pull feels now - actually SA too.