At first glance, it is easy to mistake these two boats by ER0L as wooden or plastic models, rather than LEGO creations. In part, this is due to the impressively constructed curved hulls, which is not the easiest thing to do. However, building a memorable LEGO boat is about more than just smooth curves. The smallest detail can make a big impact. One such detail on the larger Sirius is the white rubber band used as a hatch seal. With the smaller Mona, the use of some older hinge plates to line the inside of the rear compartment is genius.