Great report, and you're obviously a very patient man. About 10 years ago Yamaha made an AWD WR450 with Ohlins-designed hydraulic drive to the front wheel. I believe around 50 were manufactured, and as there are a couple in New Zealand they no doubt got to Aus also. Based on my many years experience with water cooled Yamaha singles and also with Ohlins products, one of those might be a better choice for you. They're quiet, too.