John, Our harvests over here are the exact opposite to that of Canadian and European conditions, ie stinking hot conditions and light(er) crops. The harvest usually kicks off in October in Qld and continues through till after Christmas in Southern states of Australia. It is usually a race against the whether as we are very susceptible to storms_hail at that time of year. Yields usually get heavier the further south you go, ranging from a 30 bu_ac average in Qld up to 60 bu_ac plus in southern areas with more reliable in crop rainfall. Hot dry conditions, up to 40 plus degree's C with hot Westerly winds. The combines are all straight cutting wheat and harvesting at 7 to 14km_hr depending on crop and conditions to keep machines working to capacity, so if the country is a bit wet or heavy, you can imagine what that does to the drivetrain with a 30+ foot head on front, high ground speeds and hot conditions. Unfortunatley because we are such a small spec on the international machinery market (I heard a figure of around 400 new combines a year total for Australia) it is not worth while anymore to have combines_tractors built down here anymore, with most Australian Tractor_combine companies bought out or pulled out the huge American Companies. ie Chamberlain, Massey Fergerson, Horward Bagshaw (stopped production) and I think International may have built some down here as well, but it's way before my time. That said Mid-West make a fantastic draper front especially designed to handle Aust conditons. And companies such as Gyral, Janke, Shearer, Gason, Simplicity, Daybreak, AFM, Grizzly, Excel and Homan but to name a few, continue to develop strong, robust airseeders, tillage and zero till machinery to handle our "challanging" conditions and soils. Of particular interest are the fully adjustable tines and heavy duty disc openers that are now being developed that leave the barton or the fexicoil_JD tines for dead. Finally I agree with your last sentiments, but unfortunatly in this "global" world we live in, no longer are combines built for optimum performance in one condition, but to be jack of all trades, and unfortunatly that means that there will be some huge lossed in performance to what it "could be".