flexible dome connectors

here's a DIY method of making cheap, flexible dome connectors!

when i saw WilliamAAdams' simple tetrahedron http://www.thingiverse.com/thing:8306 it reminded me of the tubing connectors i saw in the great domebook 2 http://www.scribd.com/doc/37419493/Domebook-2

the advantage of a flexible connector is that it doesn't require absolute precision in strut lengths. this makes for easier domeraising and allows the structure to equalize gracefully.

for a similar approach not involving nuts an