Sorry I was on my mobile when I replied and it should have been a Z not an X, in relation to the width of the X the Z looks quite wide, so my thoughts where that you would be losing valuable cutting area by having the Z that size, but if your happy with the size of the cutting area you will get then it doesn't matter.

It was the same with the height of the gantry plates too really, if it was me I would consider dropping the hight down or adding another length across the X to help strengthen the whole thing up.

As I say I'm only looking at the pictures, I haven't downloaded anything.

.Me