In reply to BnB:
Thanks BnB, I've just got hold of the guide and was figuring that if we make it to Sgurr a' Mhadaidh we'll have done lots of the best bits and have a relatively short walk back to the car, if we carry on it might get a bit attritional or worse we might be tempted to carry on until the end (but I think for that to be realistic we'll need to do a bivi)
Post edited at 19:31