yeah, that's why there are very few people who do it.
Oh, and Tractorman, there's a really great place for it, a nice steep road, that starts off quite flat then rockets down (25mph on a bike easy) on the way back from Yelverton on the bike trail
Been trying to find it on Google Maps...
EDIT: Gotcha! From
HERE (http://maps.google.co.uk/?ie=UTF8&ll=50.467003,-4.088067&spn=0.000816,0.002637&t=h&z=19) to
HERE (http://maps.google.co.uk/?ie=UTF8&ll=50.462628,-4.074654&spn=0.000816,0.002637&t=h&z=19)