It looks like my sprag clutch on the end of the crank has stuck open. Has anyone taken this unit off and refurbished it? Is it a major task and any special tools needed? Also thinking about re-asembley is I need to use any special loctite on the rotor, since it is just an interference fit. Also what ft/lbs the rotor allen key should be torqued down to? Cheers Glyn.