Thanks. The problem with reports like these is that you don't really know how well people ride. I read one report that said the top of Loch Lomond was so difficult they were forced to carry their bikes, which required them to remove the panniers. Panniers?
I've ridden Kinlochleven to Fort Bill previously and although it goes through great terrain it is pretty boring riding. I've also ridden the southern section of Loch Lomond to which the same comment applies.
I was looking for some local knowledge of interesting alternatives generally following the WHW route. Looks like I'll have to post on the biking sites