Hi again Rainboe,
"The major determinant of Max take-off weight has to be structural strength of the Gear, with wing strength and lift having a lot of effect too."
Well, I'm not sure I agree, for the following reason. If you were to calculate the forces on the gear at Mtow and during an average weight 2.5g (Mad (Flt) Scientist) landing, the structural strength of the gear isn't really limiting at T/O.
AD