Not sure why....
Beneteau did that. The 311 is (I believe) the same hull as the First 310 and Figaro Solo, a Finot design that Beneteau seems to keep putting new interiors into. The First 310 has stays that are inboard on the deck, with bars behind the settees that carry the load into the hull structure.The 311 is a boat I considered replacing my old First 32 with until I realized the position of the stays. It limits the options too much.Short of major modifications to bring your stays inboard enough to point well, I'm not sure you'd be able to carry anything larger than the 110% the boat comes with. There is one thing you might do to be able to carry larger headsails, though...Find a Catalina 27 or 30, and look at the forward lifelines. They angle downward to join the bow pulpit at its base from the first stanchion, that allows the headsail to sheet inside the pulpit, then outside the lifelines (and stays), where it is sheeted to the toerail.Can't get it in tight enough to point well upwind, but that'll get you the ability to carry more sail area up front.Good luck,Tim