Box joints without kerf correction?

Yes and no.

Keep in mind that the cut profile is sloped, and it’s wider at the top surface. If you flip and refit, the apparent kerf will usually be much smaller, if you’re using good settings that don’t overburn.

The good news is that you can generally dial in your settings in one or two proofs, and that for most things and most fits, it tends to land around .007-.009”

I won’t get into the mechanics of how to compensate; there are a million threads that cover that, but I’m able to get insets that have virtually no kerf by inserting a flipped small piece into a right side up main material, it’s just a matter of patience and being methodical.

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