Matt,
hearing what you say about the CRS on their Beemers. We ride bikes down every year (999,996, SP1,R1 etc), and stay quite a long way away from the N138 and such like. We tend to cross ithe N138 at Gace, and take the chance to grab some lunch at the cafe/bar/filling station.
I still think we can gice those guys a run for it, with them in their open face lids (flies at 300KMH hurt), tight trousers and the prospect of severe gravel rash from having short sleeve shirts on.
Not sure.....might just play safe and stick to the speed limit.
Then ago.....no.