I don’t want to call it a “jointer” because it really just gets the edge straight on rough sawn lumber, but here is what I made last night. It has a miter slide on bottom and slides in my miter slot. My saw has an outfeed that allows 8’ to remain supported, but this would work with smaller outfeed. I routed in T-slots every 2 feet for holding the workpiece. It was made 1/8” proud of the blade and the first pass trimmed it flush to the blade. I use almost exclusively rough sawn lumber, and this was a must.

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Note: the left miter slot on my saw goes end to end. The right one doesn’t. It used to be both stopped and I routed the left one all the way to the other end, and quite frankly it was late and but the right one would be too close to the Unisaw on the other side that shares an outfeed with this saw. It is for dadoes and this saw is a 12” with 1” arbor.