8 hours 20 mins.
First 5 hours religously kept my HR under 68% - then for the rest let it up towards 75% as the wind took it's toll (and I was feeling a bit feisty) - about 7 hrs at the 112 mark - so feeling pretty confident given open roads, no bloody wind (hopefully), 4 months more training and tri bars that can comfortably get the bike done in under 6 hours..
