Hello Trevix,
Well, I purchased 2 new railing (for X and Y) with special bolts that have no gaps.
I got some trouble to fit them on the base, but it was worth the time spent.
Nowadays they told me that programs (ex Mach3) do have correction capabilities even for these gaps! I didn't searched further so to say my opinion and details. Please ask to the forum where this correction is located in Mach3 and under what name..
It goes well!
(Obviously you mean you will keep Z axis-not Y you wrote.)
The Z was the biggest problem as you see from the structure!
Speak again,
Kostas |