I worked wit the FOBA's from the 90ties on in my studio and mainly on location (musea).
It's one of the best investments (and expensive) I ever did!
It never failed me, I could built what I wanted and it could hold and support surprisingly valuable, heavy and complex objects, like bronze sculptures and archaeological artefacts, safely.

The only downside is it's weight, hauling around my vast set nearly literally broke my back (resulting in a TIA)!

Here is the more actual documentation:FOBA_combitube_system.pdf