I am back and I am glad.
We can continue with some more info from CZ-UB. First one hundred sets SA parts should be in US by end of this year. Three parts need to be changed: trigger, hammer, firing pin block lever, #8,11,13 in the instruction manual.
Reset could be changed to zero if you prefer but it is not recommended. Trigger on my gun is not finalized. As you see on the picture, there is missing a set screw (the top one) for adjusting the reset. The hole should be higher and the screw should touch the frame and move the trigger back. He decided that 6-7 mm is good enough and I don't need the screw. The new trigger will have a set screw in little different angle and you will be able to reset trigger to zero position (if you dare).
Next - the trigger pull 1lb 6oz? Here is the picture how I measured the pull.
If I place roller to the middle of the trigger it shows 2lb 0oz, and on the top 2lb 8oz.
How I measured: I moved the trigger to the end of the trigger travel and pushed 'Ready' on the Trigger Pull Gauge than pulled. If I begin to measure when the roller touches the trigger it will show 2lb 12 oz.
Here you see the position of my finger using SA. This is the beginning point - 1lb 6oz pressure on finger tip.
and here DA/SA.
I don't know may be my fingers are crooked, but on the SA trigger I feel the finger is touching the trigger more naturally, the angle is different.
On DA/SA I need to move the tip of the finger up to the middle of the trigger and I feel like I am twisting my finger joint. But that may be only my feeling and nobody else has the same experience. I wish I could have all my guns with SA triggers.
I will post more news from CZUB later in General Topic.