Yeah, It makes sense, thank you for clarifying, it really helps. There’s one thing that slightly confuses me is what do you mean by the middle stiffner share nodes with the L-bracket, so no contact is required. Is it modelled as a single surface body? or did you define some kindof mesh connection or used shared topology. When you model two surface bodies in contact, it doesn’t really have to share nodes and if you didn’t define a contact between two surface bodies there wouldn’t be an interaction between the two bodies or am I missing something?