80/20 is nice and can be tailored to the size you need (you can use their software to size it - free download). It assembles like a big erector set and offers some design flexibility. I feel I've minimized the possibility of the Y axis "racking" by using a dual Y axis setup with the Router between the two.
Good luck - heaps of approaches and choices - Jim
__________________
Experience is the BEST Teacher. Is that why it usually arrives in a shower of sparks, flash of light, loud bang, a cloud of smoke, AND -- a BILL to pay? You usually get it -- just after you need it. |