In reply to Wee Davie:
thanks for the video of a real gem of a route. As the video shows, the ice pitch is good value for II. A mate and I developed a strange obsession with this climb in the early 90s, as well as Ken Crocket it was recommended by Bill Murray in 'Mountaineering in Scotland' (or the other one). We made several attempts, all defeated by soft snow on the walk in or poor weather (no conditions weren't always better in the 90s). Since we lived in Essex at the time, this was quite a faff. I remember trying to sleep in the car at Tyndrum listening to the rain bounce off the roof.
Eventually a different friend and I climbed it in 1996. The Blackmount are a fantastic range, the route should be considered as a great mountain day with a short climb as a bonus.