I have now read the guidebook description. ( "Why didn't you do that befo.." just shut the feck up, eh.)
1 Paths marked on the OS map for this route either do not exist or exist in a different place.
2.The way I eventually adopted in the mid section ( ie climb up onto the ridge and stop looking for a contouring path) was "correct"
3 This is a grade 4 (highest) difficulty walk . For this area, of course.
The Naismith is given as 3hr 50min, so I wasn't that far out, was I ?
I have not yet decided whether to retrieve my rucksack from the wheelie-bin.