One of the salesmen at Friedrichshafen Aero a couple of years ago was muttering something about being able to use average weights (as we do of course in airline flying). I was a bit sceptical, but given that 475 kg is a paper number which has nothing to do with the capability of the aircraft eg Pipistrel under different jurisdictions has much higher max take off weights, I wonder if anyone else has given this one any thought? The autogyro world recently saw a big jump in mtow at least in Germany, which made a lot of sense, but seemed a bit unfair on fixed wing ultralights.