I have a Shorelandr model B148/1612FN builtin 08-1996 according to the VIN decal on frame. GVWR is 1495 pounds with 4.80x12 load range B tires, carrying capcity is 1200 pounds. Subtracted carrying capacity form GVWR and came up with a trailer wieght of 295 pounds. Does anyone happen to know...