Kevin,
Good spot! THere's no bleed at the moment. This is a first fix at the moment so I can sort all the pipework through the tunnel. There's a couple of threaded bosses on the top of the rad that I hope can simply be drilled through and plugged with a bolt / o ring.
Has anyone else done this on the winner racing rads?
Nick,
I'll try and get some detail pics later and send you an email if I get a chance,
Duncan