Someone came up with this puzzle a long time ago. I think it was Moses, or maybe Methusula. I first saw it Here on LJ.
I eventually drew it out in SU. So many folks have asked for the drawing I thought I’d post it here. It should be self-explanatory.
PS: Obviously you’ll need to make two of these pieces.
-- Backer boards, stop blocks, build oversized, and never buy a hand plane--