I'd like to learn from the experience of others as I embark on a journey to build a modular lightweight construction system that utilizes synergetics for form and load bearing optimization.

I've run into a few snags so far, but don't let my focus on composites bother you. I'd just like to know things like wat experiences people have had building tetrahedral trusses, for example, or joining struts for domes in whatever material they are using.

If other have experience with smaller structures, that would be very helpful. I am thinking tinker toys, and hobbyists who might have some experience.