Brilliant Alan!! You've encapsulated my own thoughts completely. I too was a regular Classic Manx and Classic TT competitor until an 'incident' at the 26th Milestone during the 2014 Senior Classic TT. I held the races in the highest regard, I did have 'issues' with the Classic TT format but accepted the commercial realities associated with keeping this incredible event viable.
However, if the fuel tanks of the first two finishers were oversized then exclusion was the only option at the time and still is now. In my opinion there's no such thing as legal cheating regardless of the Classic TT regulation's weasel words. Cheating is Cheating!!!!