Plated Six Piece Burr
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"When I worked on a project called Bent Board Burrs I noticed that the principle of adding a 'plate' to the end of the pieces of a six piece burr might be an interesting variation of the Chinese Cross Puzzle. My exchange puzzle 'Plated Six Piece Burr' is the highest level burr of this type with notchable pieces." -Frans de Vreugd