Has anyone had a problem with the Powermatic 3520b tailstock gouging and scratching the bed of the lathe when moved. I just put together a brand new 3520b. I cleaned all parts before assembly. When I move the tail stock it leaves very deep scratches in the bed. I took the tail stock off and examined it and could not find any sharp points. I cleaned it again, lubed it and put it back on the lathe. Same problem, when I move the tailstock it leave deep marks on the bed. I've tried adjusting it, wax etc. All to no avail. Any suggestions?