Daz- glad you figured it out. Bothers me that you would want to get rid of your bike whenever a difficult to diagnose problem pops up. I think I posted on your vibration thread that it was likely a small problem, you just had to find it.
I knew nothing about the innards of my bike when I bought it, but absolutely refuse to take it in for service or anything. Even something as simple as having tires mounted and balanced, the only time someone else touched my bike, was screwed up royally (I've since bought a truing stand, and now true and balance myself). I know what its like to have something unresolved, I can't sleep til its right.
Whenever I run into a seemingly insurmountable problem, like when my engine made that horrible hammering sound after I adjusted my valves, or the terrible vibration in the twisties, I remind myself that these bikes are easy to work on, and they are bullet proof. There is nothing like the sense of self-satisfaction you get from doing your own work, and finding/resolving problems.
Just got in from a trip to Barber Museum in Birmingham. 600+- miles in rain, heat, and cold. Cruised a few hours 85 to 90mph. Easily hit 100 when I wanted to. Bike never missed a beat.