In your proposition, when the mast is in one of the hulls the boat should be called a proa and when it is "parked" in the middle of the beam it is a cat again.

Proas don't have "transversal travelling" masts and in fact it is not likely that anyone will develop one soon.

But what you suggested makes sense - it is like Team Philips with taller masts, using one sail in each tack. Not very practical, but still a great design.

(You know who loves proas and can tell you all about it - Chiodi)