What feels like the cranks skipping a beat

Also, I found a great tool-less way to remove a cog which is hard to remove (just do the opposite of what it describes, as this is for installing a cog) - http://204.73.203.34/fisso/eng/schpignone.htm

Seen that method before. Never noticed this sweeping, and IMHO dangerous, statement before though.

The lock ring is now unnecessary.