Thanks Roger and Grabeach. Point taken re staying on the tops - that sounds a much better idea. Yep will do that. This walk is planned for another 3 weeks time, so plenty of time for tweaks and improvements
Maybe 7.5hr is a bit short too, (although could be longer as you say, if regrowth has been enthusiastic). I was looking for an easy two-day circuit really, so any other thoughts welcome.