My new 6040 bed has a run of 1.4mm height across the x axis (x0,y0,z0 to x388,y0,z1.4).

This seems quite a lot of slope- how typical is that much difference?

In mean time I have compensated by milling spoil board flat.
I'm thinking of adding a shim on the gantry leg, but I need to check tram of spindle 1st. I hope its out by same as gantry/bed cos then shim will make everything better.

Spoil board milling will be fine, but I also want to mill some metals using a vice etc (no spoil board).