A quick idea for stronger x-axis gantry. What tell the public about using two c-beam and hanging the router/spend between? The design would cost more, as well as taking up more space. However the design could potentially create a significantly strong and rigid x gantry. Allowing for better z-axis strength, and sturdier spindle/router mount. I have not seen a design on the form, but I could be mistaken. -Cheers!