Yes I noticed the slight misalignments, but I think the accuracy is enough for my purposes.

Ok I changed to women's clothing and I'm trying to rotate now.. Kidding! Thanks man, you've opened a new psychedelic world of rotation for me! Everything is locking into place now.

Ok I chose the points in reverse order and it seemed to do a better job, but it's a long way from a curved surface! This is basically a radial array, which will just produce a bumpy result.

Yeah I tried that center point already (at the bottom), but using it as the first point and a corner as the endpoint only gave me a "six pointed star", ie. it rotated around the center point.

How do I find the origin (0,0,0 ?) for the rotation? The truss was already a component, so I copied and pasted it in place.

Many thanks for the mini-tutorial! Yes, I'm a complete novice, but I'm familiar with action centers/axes especially from working with Modo, so I think I can get the hang of those any axis rotations.

Thanks Frenchy. The dome truss by TaffGoch has a honeycomb as the bottom shape, though, and not a triangle.

Geodesic Dome Truss
TaffGoch says in the description: "Can be used to construct geodesic dome or sphere"
I'm actually a total SketchUp newbie, coming from Lightwave and I was wondering if SketchUp has a feature to construct a truss sphere by cloning from this "triangle" model of TaffGoch? Manual rotation and placement is a bit tedious