So after seeing a post here regarding a newer Stern's playfield arc, I checked my Pinbot in part because I needed validation from the obscene amount of outlane balls. It's hard to tell from the pic, but sure enough, it's closer to an 1/8" on each side, stronger on the right where most balls are lost. I'm planning on installing a Hardtop. I'm hoping this is something I can level out during the sanding process? Are there other suggested corrections to this using a Hardtop? I can only assume that any arcing is done happening after 35 years.

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