Yup, that's the one A very windy twisty bit of road and great fun (Jimmy, where are you - add your experience because I bet you have been there)

FYI The route was through Clackmannanshire, onto Stirling, caught in traffic in Callander, Ice cream at Loch Katrine, Dukes Pass, Arnprior and down through the Campsies (almost as nice a road as DP) then back via Falkirk and Linlithgow. Nice day out