Brilliant - thanks guys.
Paul / Malky - that would be the route I'd be taking. Not the TD Gap! My map was to roughly show my intended direction.
Kev - thanks for topo! Very useful. And I'm praying that your claim that the scramble up from the chimney to Alisdair isn't as bad as it looks!
Cheers all - I think this will form my plan if the weather and my legs are good, and I fancy a challenge one day.