Many of the cramponed paths on the coire rim are perilously close to the corne lips (i.e. 1m or less in places) as the vis has been so poor you can't see the edge until your on (or over :-( it at the moment. Take care and rope someone up to find the edge or navigate well in from the coire rims in poor vis.
Back at Glenmore Lodge next week teaching winter lead climbing.