… checking for Austrian Airlines bicycle policy 
On a more serious note, I’ve been thinking over the AM’s space frame all this time – now I think there must be a point in it. It must be (nearly) as stiff as the solid frame, but weight only a fraction… Also an interesting feature it this joint. Why there’s no AM convertible tandems?
PS. And yes, British racing green is awesome! Congratulations to you friend’s customer!