I had been meaning to update Clarkbird's ref for a very long time...basically months after the first one! It's been a couple years since then. I had intended to not change much except adding the blue -- in fact, I was hoping to simplify the design some... However, it doesn't have to be followed concretely at all, it's intended more as idea fodder than anything.

In fact, you can follow the old markings if you like: https://www.weasyl.com/character/11105/clark

In case you'd like to see, here are the lines: https://dl.dropboxusercontent.com/u/20878507/heylook4/newclarkref_lines.jpg