Summary

Two asymmetrical tetrahedrons with a spandex diamond stretched inside them in a gentle curve.

Hubs are sized for 1/4" dowels for the spokes and 1/8" dowels for holding the strings in place.

When printing the hubs make sure to label them!

Lengths of the needed 1/4" dowels:

1 to 2 : 334mm
1 to 3 : 256mm
1 to 4 : 511mm
1 to 5 : 395mm

2 to 3 : 269mm
2 to 4 : 524mm
2 to 5 : 408mm

3 to 4 : 384mm
3 to 5 : 271mm

More details on constructing these here: http://www.thingiverse.com/thing:923670