I've got a Powermatic 208 20 inch planer. Having problems with "dishing" as the rep. calls it. Most of the time I get waves in the boards and usually not the full length of the board. They are 3/8" ridge to ridge. Appears to be worse on the left side and has even happened on just the left side of the board with the right side smooth. Even turned the board around and still on the left side. Have checked infeed, chip beaker, pressure bar, and outfeed and all are to specs. Table to cutterhead is off only about 0.001" from side to side. Called PM and they said raise the pressure bar from .008 to .003 below the cutter head. For 2 boards it was fine then started showing up again. AND the dishing isn't the same amout all the time, sometimes less, sometimes more. Have run SYP and red oak, does it on both. Have used backer board (wide board clamped to feed table) to rule out bottom rollers, got same result. I also lock the table each time. ANY IDEAS AT ALL????