quick update - I've drilled the holes and shaped them with one of those saw drill bits and glued and temporarily screwed the scoop over the top to help force air up through the holes.
Tommorrow the glue should be set enough to test it out (I'll take the screws out) on a trip down to Milton to get a new tyre on the back. Meant to be bloody windy everywhere over the next few days so I should get some idea if its made a difference.
I have taken some photos but I'll only put them up if it does work.
Thanks for all the helmet and plugs info - I like the look of those Nolans and you guys seem to rate them well. I'll try with some better earplugs first though. I've just been using those foam ones with mixed results, and it looks like I have also been guilty of not reading the instructions so my technique for putting them in will change!
Cheers
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