I have read thru the June 1999 paper describing the hinge and ball joints modelling and understand the concept and issues and have previously done a design based on this.

I am working on a new project and downloaded the referenced Barco.zip file to review the methodology.

In particular the Barco2 model is unclear to me and I would like if David D. could take a look at the current .zip file and explain in greater detail each of the nodes and in particular the restraint nodes and CNodes used.

Thank you