I seem to have narrowed it down to the front diff assembly slipping bud, I've just had it out, stripped it down and basically just put it back together and tightened it pretty good. I think I may have solved it, its not clicking how it was in the vid now.
Gonna test it on street in a min, just getting it back together.
Callum's Dad might be down on sunday so if he is callum wont be racing. It's prolly 50/50 though. Be a good day for him to start too.
It's been since I used your back wheels at cullingworth
only just got round to sorting it. Got the tekin motor in their for him too, just trying to get the gearing and timing/boost etc right for sunday.