On the track noise testing thing, Chris, I thought the distance was 1 metre not 0.5 metres, but I could be wrong on that as haven't been static tested for a while now. Mick has made me a super set of megaphones which clearly won't pass any noise test on the planet, but I am keen to try them at least once somewhere (where accepted) 'cos they sound flipping fantatsic! I wonder what level they would test at? It would fun to measure them one day.