Thanks for the reply.  I too love the shape of the 104, sleek and very much like a fighter should be.  I can still remember the first time I saw one for real (the only time in fact).  7 of them went overhead, we were at a cricket match just a few miles from Biggin Hill Airfield here in the UK, what a noise. Really I've never heard anything quite like it since.  ;D 8-)