I have a 326 with a Selden furling main. I have to lower mast for repairs. I am at new club that all members do their own thing, so I have never personally taken down the mast. Question is should I put top rope attachment just above or below top spreader (I have 2 spreaders). Someone told me I need to find pivot point, any ideas how high. Also, I just purchased 50' of 5/8" dock line with 1900 lb capacity, is this strong enough?