A tutorial is never too old to bump and I'm glad to hear that you liked it.

I think your outcome is pretty cool, you have a good sense of flow and depth.
What I would suggest is to remove the text, it's distracting and doesn't add anything to the sig.
I'd say to sharpen Chip more, to make him evenly sharp with the highway lines.
The colors are a bit dull and dark, you could crank up the vibrance and contrast more, even play around with the "selective color" adjustment, to make the colors come alive.

I'm happy to see that you wanted to revive my old tut, you did great