Thanks for the tip � hadn't thought about that (was considering trying different mirrors though). I'm coming around to the thought that it's just a phase my bike's going through. I guess, after 15,000, things like bearings and bushes, even the rear shock and fork oil, are no longer factory fresh and perhaps that's all contributing.

Clearly more vibes are getting through to the front end than before as the zumo rattles away in it's TT rubber-mounted cradle far more now than it did on the trip.