BG141711388 Iam going to make an assumption that the bow you refer to is a problem with the mitre bar assembly. I have a similar DeWalt and when I put the bar in the track, the bar rose a few mm at the far end of the track! So I found that the bar was curved. So I took it apart and found the bat was now straight. I also found that the black pad under the protractor part was too thick and should be flush to the metal bracket it sits next to. So I sanded the pad down carefully with 100 grit sand paper backed with a flat block. On reassembly I found the bar was straight and flat. Cheers

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