I have a Selden furling mast and need to use the halyard to haul me up to fix/replace my anchor light. I took the sail down, but it appears difficult, if not impossible, to remove the halyard from the top swivel without losing the pin down the mast. Can I attach a line to the shackle that held the head of the sail on the swivel and tie that to the bosun's chair? The other option would be to make a loop in the halyard and tie that to the chair. What have others done?