Mr tipweight,
the L1 i used to fly weighed 2700lb and the mauw was 4150 for that a/c, that meant 1450 for the pilot/pax and fuel. now if you had 7 normal size people, you can see that it is not possible to put much or sometimes any fuel in it !
it was all a bit of a problem and when you were heavy even in a normal english summer you spent all your time trying not to overtorque it.
when the owner sold it I was kind of relieved because i was fed up of flying everywhere heavy and on min fuel
regards
CF