i tightened it pretty well with the chainwhip, was just trying to be safe and get the lock ring nice an tight. problem is cos it's a miche cog with the slot in adaptor thing it looks like you really need the lock ring to hold the cog there. the lock ring isn't spinning or anything and you can't just pull it out along the axle, but i imagine it's pretty dodgy
i tightened it pretty well with the chainwhip, was just trying to be safe and get the lock ring nice an tight. problem is cos it's a miche cog with the slot in adaptor thing it looks like you really need the lock ring to hold the cog there. the lock ring isn't spinning or anything and you can't just pull it out along the axle, but i imagine it's pretty dodgy