warped brace

I came back to besiege after a year or so, and now i'm struggling again with brace warping :D i need help: i've seen a lot of machine with very precisely warped brace and i can't figure out the calculations to warp them my self.

I attached a picture to better explain my problem, in that picture one of the axis of the brace has a scale 5 then i rotated the brace 10°, how can i calculate how much i need to rotate the brace cube faces in order to sit flush with the wooden panel?
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