I was speaking to someone from the A.C.U regarding proposed changes some time ago, and he said a study had proved that people are only capable of concentrating on any one task for an hour. The intimation being the races would be shortened. I attempted to get hold of the Manx motorcycle clubs incident book which holds the 'truth'. But they are unwilling, less it should fall into the wrong hands..... Fair point I suppose, but it would be interesting to see unmolested stats on incident and reason.