6 identical pieces puzzle

This puzzle is made from 6 identical pieces. Print or carve 6 of these and then figure out how to assemble them into the interlocking shape. Fun!!

Edit: I am using this as a calibration piece. Each one got better than the previous by tweaking one (or two) settings. And when you have 6 you get the complete puzzle. That way the repetitive calibration piece isn't a throw away.


There is also an "improved" version that may be more of a challenge to print with 2 unsupported faces.
Ed