Sails and weapons are magnetizable but also have a peg as well. 3x2mm for the bottom sail and weapons, 2x2 for the top sails.Sails can be removed, and the front one can be replaced with an extra long chest and chain weapon.
The water is separate, but I have included options with it attached to the hull for ease of printing.The hull is solid so you can hollow it out.The weapons come in short, standard and long variations in case you'd like to mount them elsewhere on the ship.
And the cargo pieces can be used to hide the holes in the deck if you wish to move the weapons, or not use them.