The way my rods are mounted the smooth rod covers the t-slot screw head, making it very difficult to tighten the screw or align the rods. So I created my own part with two offset screws for much easier access.
This also gave me an idea, the current lower Z rod clamps are not at the end of my Z rods.
So ultimately having the lower Z mount achieved nothing as you can't move down that far, but swapping the original mount for my new mount did enable me to remove that screw and give me full Z movement. Untill the Stepper mount is hit.
I'm now wondering about mounting the the Z stepper motor back at the top with the lcd screen elsewhere so it is not blocked by the stepper motor.