Yeah i just assumed it was a hollowtech bb because it came with some hollowtech cranks. I prefer to ISIS really, only because the cranks come off alot lot easier
I wouldnt bother if its a low bb, i had a monty kamel stem on my limey 3 for a few months, beautiful for static stuff like gaps/siddles etc. But made upto backs and stuff quite hard
Another thing with snap on stuff is that i know of several people whove had there ratchets repaired after they broke them (two of them people being my dad and a fitter at work) and theyve never been right since.
Lol had the same situation on sunday, had to use a 4ft bit of tube and a lump hammer to get the sprocket off, even then it ruined the crank threads Only way is perciverience (Yes i cant spell that word )