I had what joddly described in 2014. Having swallowed a lot of Cardigan Bay as it was quite lumpy that day I avoided eating anything on the bike for about 90 minutes i.e. Angle and feed station 1 basically as I wasn't sure if I was going to burp, fart or soil myself (remember the golden rule never trust a fart in Ironman) Having then settled down I over ate to compensate and then on lap 4 of the marathon, headed for a 3:45 marathon I got the gut cramp/pain and just broke 4 hours. Now that doesn't sound too bad overall but it was agony and if it was lap 1 or 2 I doubt I'd have put up with it.
Enjoy it, it's an incredible course and an incredible day albeit a tough one but very doable just so long as you hit the hills from here on in on the bike and run and the swim as well just in case the wind turns from the East again..
Seems to have lost my Ride & Run yesterday, think I'll stick with Training Peaks & Strava for now.
Don't get me started on my Edge 800 either, first sign of drizzle and it stops reading ascent changes and wont go into PC mode when plugged into PC. Waterproof my arse. My 910XT thinks I train at altitude all the time as well, did a 2 hour run last Sunday and had an elevation gain of 26,000 feet and started my run at something like 30,000 feet ASL.
Wimblebitch, ha ha I like that, we came up with Evilmoor.
Pretty enough route, especially along the Exe valley then up that ramp out of Exebridge, that's a slog second time round though, some hairy descents yesterday in the conditions we had but the roads were in good nick.