Brainchild and Robin working on the first m2.

Here's 10 minutes of how I spent the last 13-14 hours. Just so happens this iteration was the "one". Aside from the rigorous voodoo antics required to pull a <.001 tram out of RoGR's hat, we really hit the wall of grief on the few 1/10,000" needed relative to the X-ways bores over the height of the gantry. That is, the slightest deviation in that bore would set the gantry ever so slightly vertically out of square with the bed, X ways and the rest. Despite a nominal tram on RoGR, very slight deviations from reaming, breathing upon and looking at wrong the X bores would be greatly amplified (gasp .001" in 7") into the machinist's square which has no mercy for those who use it proper. The solution came as a necessity to invent the "diametrically opposed square inducing bore-lash compensators" on the X bores, allowing a "dial-in" precision down into the .0001 range on the X bores.