Hey Chip, I like most of the work, looks a bit heavy but I am sure it will be sturdy. You may have to beef up your display shelf a bit...
Anyways, If you plan to run the truck, cut that hoop off that closely matches the spur gear. If you get a rock caught in there I can pretty much gaurantee that the esc will cook from over current as the motor instantly locks up. That happened to me with a buggy I had with a metal spur on it, and I have always run plastic spurs since. Cheaper to replace a 5 dollar spur than a 150 dollar esc.