About this 3D model

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 and bolts, see: http://simplydifferently.org/Geodesic_Dome_Notes?page=17