Originally Posted by Brian Carlton

A full tank of fuel is about 150 lb. so taking this off the 3960 gives you 3810. This is probably within the margin of error of the scale when compared to the 3835.

4880 is the maximum gross weight with full fuel. Subtract 930 lb. for weight capacity and you get 3950. Subtract the fuel and you should get the curb weight (3800). I'm not sure where the 35 lb. disappeared.