The route we did was the actual "McTech Arete", up Crescent Spire: we raped with one 60m rope; just barely, we were definately at the end of the rope between stations, but it worked.
The rope didn't get stuck in too bad a place while rapping off of Buckingham route; I just had to lead back up about 10m of easy 5th class and then down climb, it wasn't too bad of an inconvienience at all.
Have fun!