Thor, or should that be Zeus?

[Chaz]

I was actually referring to the X. At the bottom you have two linear rails bolted to an enormous structure, most of which is superfluous, you only really need the bit under the gantry.
If you fit the linear blocks to the bit under the gantry and the rails to the table then the support will always be under the tool.
You lose an unnecessary overhang.

This is the document I was referring to.

http://www.mech.utah.edu/~bamberg/re...e%20Design.pdf

Page 176 onwards discusses Gantry designs. Mine was going to be a copy of their reference design. I agree, it looks wrong, however there is good data in this whitepaper .... did I misunderstand something?