I'm currently cycling from Durham to Iona in touring cyclist mode. Have to say that cycling on Scotlandscotia is not easy. Firstly I just never seem to make progress on the paper map. Everything is a long way apart. Secondly, the weather; it is very weathersome. 100km feels like 150km. Sun, wind, rain, hail, sun. All in the same half an hour - then repeat.
On the up side. Wow. The scenery. Wow. Yes the road surface sucks, but the payback in views is wonderful. Then there's the food and drink... Oh yes!
Honestly, I'm glad I'm touring not audaxing. Scotland is beautiful and harsh. I'm typing this from a seafood restaurant in Oban.