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I had a drill press like that and I loosened the column at the base. Before I moved it I made reference marks so it could be put back. Now I use jobbers' length drills and drill from both sides. I bought brad point drills (12") from Woodworkers' Warehouse and on the first try the drill bit straightened out. The troughts actually strait. WW refunded my money and recommended jobbers' length. The trick to getting the holes to meet is to have the ends of the blank perfectly square.
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