I asked about this sort of thing late last year
As I said back then making a limit optional would be a better option than forcing a maximum.
Other option than moving would be to make an overlay that disables the z-axis buttons when you have clicked the X, Y buttons so you have to click them twice(and an audible notification when unlocked) as I mostly have problems when I’m looking at the machine and not the mouse and the mouse starts slipping down towards the z buttons. Just moving it down may still have this problem due to mouse dpi or tracking speed for some but not for others.