Glad to hear you're OK mate...I had a similar experience recently during my trip to Brisbane from Melbourne, at high speeds, and especially after passing double tray semi's (roadtrains), I got serious wobbles...(I nearly needed a change u know what), this happened on 2 occasions tempting me to immediately slow down...I called in to the dealer in Moree who took it for a test ride and felt it and suggested the windvest (tall windscreen with a lip)...anyway I slowed down and upon my return consulted every avenue, only to find it was caused by overloading the topbox, therefore throwing out the dynamics,,, as it is way behind the rear wheel etc....is it possible this may have happened here too....I have since been much faster passing semi's minus the topbox and with it on, but empty, with no problems at all....It was possibly the windvest throwing the air flow over my head and striking the top of the topbox making the dynamics even more unstable, what do you think guys and gals?//thought it worth a mention, and would appreciate any reactions...j... PS Have since changed the tall windvest for the 6 inch smoked one...