I'm a little surprised you bid on it before having the design nailed down. As for what makes you a moron, that's up to you. I'm sure some people consider any tattoo moronic.
I know a guy who has tattoos that have some meaning to him, and I know a guy who has lots of tattoos that he got because he liked the art.

I personally would hesitate putting a corporate logo on my skin. But if you like the cars and like the look of the star, why not? Just the three pointer without the circle maybe?

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1984 300TD