Congrats on building and releasing this passion project! I love the hand drawn aesthetic. You had a vision and made something totally unique on your sabbatical. I hope you don't get bogged down in making it more "accurate" and "comprehensive" (unless you really want to!).
Similar to you, I worked in bike shops for years before getting into web development, so naturally some of my first toy-projects were an attempt to combine what I was learning with what I knew about bikes -- for example, a diagnostic tool based on the sound your bike is making (http://nathan.codes/showcase/#bikegnosis). It will be imperfect, just like your bike, but it will be totally your own!