The later 180s max T/O weight with the floatplane mod and the larger dorsal fin can be increased to 3200LB with a 'Kenmore Plate'
Both the 180/185 are still the best anywhere in the world for getting in and out of fields on the sides of hills and sand with a decent load...
In the '60s just about every aero club in NZ had one as the 'cross country' machine.
They are still a fun machine today...