If that's the case, then the
winches need to be refastened to the deck. Not many old style pics available online, but this is proabably how the base looks, once the drum is removed:
In this model, four screws secure the bottom flange to the deck (or combing). The holes could be stripped - which may have been caused by other problems, such as a wet balsa core. There should also be backer plates beneath the deck, for through-fasteners.