fresh start 8x4 build

[JAZZCNC]

Ash easiest way is to have two plates. One bolts to the bearings and other is bolted to and part of the gantry. These then bolt together with the lower plate being threaded for bolts passing thru the upper plate and in location that is easy accessed. This way you can place gantry on bearing plate then lock into position when square. Then drill ream fit dowel pins to lock in place if wanted or just have tight fit.
Tight fit works well when first setting up and learning becuase if you bend the machine out shape can easily get back square by lossening bolts starting again.