When driving at speed my bonnet lifts up slightly so its not flush with the wings, would vents cure this?
Doubt it. I fitted an RE Amemiya fibre glass bonnet with plenty of venting, and it still did it. So I fitted some hood pins.
Dan
Unfortunately this seems to be a common FD problem :(
Mine used to do it but l cut a piece off the top of N/S bonnet stopper then adjusted the catch down to pull it tighter, been O/K since.