Put out some photoes of the 3 versions of dumper bodies I have fabricated in the Tamiya size. They are all scale versions of modern style Scandinavian dumpbodies from the 2005-2015 area. 'Zetterbergs Eurodumper' and 'Sorling Goldstar' are swedish, B&P is Norwegian designed. One generally stopped designing the bodies with the traditional vertical side ribs around year 2000, and went on to the more clean style.
I make my replicas of galvanized steel, 0.7 mm, and Alu compact profiles. Mostly glue the Alu to the steel, some spot welding steel to steel. Deadweight is typical 3 kg/7 lbs including the 'help frame' and engine/spindle. Could made them lighter, but it helps great with the traction driving empty with the extra metal I put on. Typically 120 off custom-made parts on a complete dump body setup, so it take some hours get it done)
'Zetterbergs Eurodumper'