Diamonds (STC #269) puzzle

This is a variant of Stewart Coffin's Hexsticks puzzle (#25-A).  It is #269 in his numbering sequence. There are 12 pieces total and 4 types of pieces.

Print 7 copies of the Standard piece, 3 copies of the Skinny piece, and 1 copy of the Key and Augmented pieces. No supports needed.

With 12 pieces, assembly may appear daunting.  But keep at it, assembly is actually much easier than you may think.  I suggest starting with the Standard pieces to see how they might assemble to make the final shape.  The Skinny pieces go in near the end, the last piece to go in is the Key.

The finished puzzle is sized to fit in a 3" box.