Towing 2006 Kedron ATV with extended drawbar with Toyota series 100 Landcruiser fitted with airbags - measured download on van drawbar fully loaded is 200 kg - came complete with Hayman Reece torsion bar load sharing kit and adjustable ball mount assembly. Have tried travelling with and without the Hayman Reece system ( which adds about 25 kg at the ball ) with no apparent difference in performance - using the air bags to achieve level travel. Am I missing something ?? Comments and advice are very welcome .