On my SX2.7, there's no way to adjust the tilt of the head in relation to travel in the Z axis - it's one single casting. I can only adjust the tilt of the column by shimming.
So I can either have the travel along the Z axis square the the table, but with the cutter at a slight angle, or have the spindle trammed but with a slight shift in the X/Y axis as the Z moves up and down. Which adjustment is more important to have dialed in?