HFO Tech,

Thanks for the clarification. Haas shims the column at the factory, if it is needed. But it sounds I am somewhat correct in that it would make more sense to shim the spindle cartridge, if needed. Based on your words, you, yourself, never needed to shim the column in the field. And from the sounds of it, very few, if any of us machine shops would have all of the needed apparatus to check the square, parallel, and perpendicularity of the machine, to the degree Haas does at the factory, when dealing with loosening the column bolts. In my words, it might cause more problems than it's worth. :cheers: