What is the fine-grained topic of the following text: Look closely on the hull and you can see the individual planks and wood grain - Highest-quality sails and additional rigging over all other models: The sails are slightly starched to hold their shape and a higher quality and higher thread-count material is used similar to that of the actual Shamrock sailboat at the time it sailed. Only return the topic.
Details and quality of Shamrock sailboat model construction