In reply to Dan Bailey - UKHillwalking.com:
Indeed, a tremendous day out. There are a few minor variations that may be of interest. The ascent out of Coire Mhic Fhearchair can be done about 4-500m to the left of the stone chute: there is a line which, albeit pretty steep, avoids almost all of the scree and cuts the corner off a bit. In good snow conditions, an even more direct line to the top of Ruadh-stac Mor is feasible.
For the descent, a fun alternative to the eroded path in the upper part of Coire an Laoigh is to stay on the ridge over Stuc Coire and Laoigh and join the path lower down. There is an some mild scrambling and clambering over big boulders. It is also possible to take a more direct route back to the start: form the cairn at the top of Coire an Laoigh, bear right into Coire nan Clach and then take a fairly direct line from the lowest part of the corrie lip. Lower down, you can cross the burn to regain the starting path, or if the burn is too full, follow the outside of a fenced off area back to the road.