Pay attention to the starting base weight of the 320's, and the year of it ....they make 3 different Base models .... my 320CLU (which is in the middle) claims to have a base weight of close to 51,000 #'s it's more like 52,500 #'s and when I carry the extra bucket and full of fuel it's 54,000#'s ..... we have a gov't rate book that tries to id all construction and forestry equipment ... my CLU falls into the 21-22tonne class, 1 class higher because of the hp, lift and the weight is greater than 200's/20 tonne machines..... my 312 is supposed to be a 12 tonne machine..."BS"...its more like a 13 tonne naked and mine weigh's 14.7 tonne/32,400 #'s the way it sits ....it hurts me in the rates, cause iI go up against the 120's that are 100's on steroids, the 312 is the identical machine as the 314, same hp,same boom & stick same UC same pumps, just not a RR unit .....I don't know what regs you have down there but I know here we can not load the 320 on a tag or tilt when its pulled by pintle hitch , but can load it on the right 5 axle set-up (3 for the truck and 2 on the trailer) or if I remember that would be an 80,000 # gross set-up in most states ...... good-luck on your purchace