FYI for anyone interested. the pic below is one of the rear main halyard sheaves. As you can see the one side is worn right off. the previous owner had oversized halyards and as you can see bigger isn’t always better. so if you are finding the main harder to hoist or it’s not dropping as easily have a good look at the sheaves. I replaced all 6 with ones from Garhauer with bearings as well as new axles from Rigrite.