When first built, Mumble was open-decked, sported a centre mainsheet and had a mind of her own (subsequently cured by Roger Cherrill using a much larger rudder). But it made for some interesting sailing - in a blow at sea, you had to sit back to stop her swamping upwind and you had to sit forward to stop her corkscrewing downwind. What's more, tacking was a bit iffy - I remember sitting luffed and stationary with no control on the start line at Brancaster, and only managing to get away once she started moving backwards. Mind you, we won the race - everyone else must have fallen in.