Inspired by the excellent open source talk given by Jeremy Blum during BSE 2011, Iltimas wrote up his longboard wheel tread enhancement as an instructable! Tired of not having good traction in the rain (It would take much more than rain to keep him off his board), he decided to make a few enhancements. After reviewing designs and modifying them for the resolution that his tools were able to provide, he executed his plans. According to the article, he saw significant performance benefits in the rain. Good work Iltimas!