Summary

Found this model by Reza on Grabcad (and then subsequently here on Thingiverse) and converted the files to meshes for printing. Fantastic design!

Instructions

Material thickness is designed around 2mm so make sure that your layer heights are set accordingly. It's an accurate fit as designed and if your parts are much thicker than 2.00mm, you'll have a hard time getting everything to fit together.

Use the file names as hints on how many times to print each part. the _x number will tell you how many copies to make. 22 pieces total (though you could scale the center clip on the Z to make it one piece instead of two)

Bird