Thanks RSmark84, I will have a look at those too then. I had 3 inch before but wondered if 2 would be better on the road.

I really like the concept of the 3 point with inertia real but they look to be cheap and probably not fit for purpose with a big cage to bang my head on.

Ex F1 driver, Willie Green used to teach me a bit on track and he said "you don't know pain until you break a shin bone on the bottom of a roll cage".