We have the same method of having a strop at the height of the required position of the pulley, if you want to have fewer holes in the mast, take the line to the top of the mast & tie it off there instead of drilling 2 holes in the sealed part of the mast for an eyelet. (See the attached pic.) The holes for the line which holds the pulley in place are in the luff track, outside of the sealed section of the mast, so no water can get into the mast.
