Great model! But would probably take major reworking for Poser, largly due to Poser's ancient geometry handlers (7 years with no changes!) The sail might be taken down with a morph target but what might be better is to use Poser's variable geometry feature so that one dial would bring up a couple of sails in different postions (that would work for mast heads as well). There's some posts on the main Poser forum for doing this.