In reply to Mike Lates:
That 4300 elevation gain is wildly out. I've never used Strava but I hear it's dodgy for that.
I've always understood it's 3000m (give or take) Gars-bheinn to Gillean, including all the obstacles on the ridge crest and Alasdair. A number of books say that. So it works out as a 4000m day once you've accounted for getting onto Gars-bheinn - and my legs wouldn't disagree.
I think counting contours is liable to prove a very blunt instrument given the illegible complexities of the OS 10m contours, and the fact that Harveys 15m contours are likely to miss a great many of the micro ups-and-downs.
In this age of gadgets someone must have a plausible figure that's not based on the map alone?