After some advise of my good friends Leendert & Karin, together with the remarks in this post I came to the following:

From Bridge of Dye, E and N to Heatherhaugh->NE and at NO 667 874 SE->
at NO681 868 NE to Glenskinnan->SE to Burn and camp at NO 721 876.

Anyone??

Will meet in the Fetteresso

Willem,

Don't underestimate the time needed to do the leg from roughly NO671873 all the way to NO707888 as it has been extensively washed out and for the most now resembles a very rocky river bed- -coupled with the winds and frequent snow showers on the penultimate night of GOC2013 it was not very nice. If you need to stop short you can just about squeeze an Akto in near the gate at NO707888 and there is a small burn there with reasonable water

To all my old and new Challenge chums out there may I wish you all a very happy Christmas and a safe and prosperous 2014 - hope Santa has got new batteries in his GPS as, given the severe weather conditions we have up here in deepest Aberdeenshire this evening, he may have difficulty locating some of the chimney pots, no doubt much the same for the rest of the UK....

Thank you for this Colin.

Merry Christmas!