A flexible connector easy to do (same in 3D) it allows to don't care with angles & cords factors; just to have right lenght of the 3 or 4 types of struts, following the geodesic frequency and class choosen.
To leave the virtual & his computer is really good for the neurones.
Just a remark: I find completely stupid to have one hundred formats of 3D file, only to make the same thing.
There is something that doesn't turn round in this world (small-milieu).
Do you imagine the same mess for the files of the Web?
That's when the W3D (WWW3D)? ...