Very nice model, impressive level of detail. Really like the steps to the upper deck and little doorway. One thing to keep in mind is that the upper sails can be extremely fragile as only the mast is holding it on; there is a slight vertical gap between the sails that looks cool, but also severely hinders structural integrity.
Printed at 20x scale on my PrintrBot Simple Metal, .2 mm layers, 60 mm/s. No supports.