Thanks to ClownPilot's advice I rebuilt my keel winch ( the handle would spin wildly on launch unless lashed down ).When I winch up the keel, as it reaches about half way it drops a few inches and is violently arrested by the cable. I can then continue to winch up the keel fully.I don't think the cable is slipping on the winch drum but can't tell for sure unless i cut out a hole to allow me to see the drum.Any help would be greatfully received.Peter.