Miller, I think Old COL is referring to the photos posted back on p. 1--not the Nitro Special.
In both cases, perhaps more accurate to describe them as "customized" guns vs upgrades.
With Larry on this one. Customized guns are one thing. They often involve frame sculpting and custom non-factory style engraving. Upgrading it trying to take something like a Parker VHE and turning it into an AH. Or take a Fox A grade and turn it into a D grade. I've done both and like both equally. I have as I've gotten a bit older like the upgrades more then the customs.