it is becoming apparent that my main halyard masthead sheave is cracked as my new halyard is becoming frayed... in addition, it is not turning freely....need advice / pics on what I need - parts wise for a 336 - and how I tackle this job.... suspect I will go up topping lift halyard since it will bring me up high enough...jib and spinnaker on this fractional rig will not get me up high enough....any details are appreciated as I don't even know how sheeve is fastened to mast....thanks in advance for your help
Dennis
Dennis