So David, I spoke to my friend today about your wobble issue, and he laughed..........He explained that it is a very common problem with the early bikes, the modern tires definitely contribute to the problem.......The extra grip they have means much more flexing of the frame parts. He has another friend here in Australia who is the Rudge man in this country and has some very fast racing models, he is going to ask him for some advice. He did say that he use to go to a lot of trouble to ensure there was no play in any of the parts in the girder forks and the head bearings........... It appears to be a rigidity problem from what I can see.