Alternative Route for Beinn na Lap

I'm always on the lookout for alternative routes on Scotland's mountains. With the increased popularity of hillwalking and the accompanying erosion, it's ever more difficult to get away from it all. Of course for those anxious to add to their list of Munros climbed, the quickest routes are often preferable. Fortunately as a 'compleater', Bagger no longer feels the need to add another tick, so increasingly I'm looking for fresh options.
I was particularly interested in this article in the Sunday Herald by their hillwalking columnist Cameron McNeish. In it he describes a different way to climb the isolated Munro of Beinn Na Lap. Most people access it via the West Highland Railway Line. Getting off at the isolated Corrour station, you can 'bag' the mountain and get down for another train to take you out. It's all a bit of a rush but I suspect that's what most people do - I certainly did. So I was intrigued by Camerons suggested route and I really fancy trying it sometime.