We have a roller furler on our newly purchase boat (1989). The headsail seems loose when up along the luff because I think that the tack is not attached down to the boat or the furling drum. It looks like it is just loose around the wire luff. This caused the sail to be loose and when furling, the sail to twist up at the top of the sail. Should the tack be connected in some manner to the furling drum? If so, how do you attach it? Thanks!