Well here is an update...
Had a hell of a time at the creek, Chewed out the rear bush and seal of the gearbox during my OLT on friday.. keeping up with 2 supercharged 2.8l BMW's is fun!
Passed the test, went back to SSS Automotive and swaped gearboxes (Engine out and back in)
Turned up Saturday moring full of beans, end of the warm up lap in Qualifying started to come onto cams down the straight and .....BANG, Tailshaft must of been damaged friday, Tore 3/4's of the extension housing off the rear of the gearbox.
Was thinking of how to fix it but officials called me up to say that I didnt complete the minimum of 3 laps of qualifying.
Back home... Back to the drawing board...Get another tailsahft made with all brand new components, 2nd hand stuff to much of an unknown, Dosnt like 8500 revs and over 200kph

Better prep next time.
Sorry B310gx if that was you that came up, I was a bit dirty when I actually saw the damage