Neat item that I've been meaning to do for a while, so I threw this one together this afternoon:

The one in the above photo was too clean for my tastes, so I scratched it up a bit.
It still needs tweaking, LODs, and I haven't yet tested to see if the collision properties work. It's currently a separate object, so you don't need ScaleRail to use it. However, I'll eventually add it to the ScaleRail packages as well as make it available on its own. If Ed likes, he can host it here too.