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Tape the 4' level to a long stick (usually on edge) and make sure that stick is straight and use that to re-check the frame. I bet you will find that the frame is out still. Its not the best way, but you don't have go out and buy a long level. The big boys hang doors this way. They use a plumb bob and measure the jab to the line.
Last edited by look 171; 07-29-2017 at 12:24 PM..
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