Will do!
Thanks for posting that video. Going to do similar approach when mounting and leveling the linear rails. One thing I am going to do differently is only level the upper linear rail on the gantry. Will then drive the gantry carriage (with 2 upper and only 1 lower linear bearings installed) down the length and tighten the lower linear rail as I go along. I found this procedure from hiwin install guide. This procedure uses the linear bearings as an alignment jig.
One weird things I noticed so far, while the steel of the linear rails is the same “height”, the “height” at which the linear bearing actually rides is a 0.002” difference between the two y-axis linear rails.