I may be crazy (just ask my wife), but I think it would look better with a wing than a spoiler. There is a pic somewhere that shows it on the Toronto red car, and I thought it looked killer.
With one of those babies tacked on I think you will never encounter a failure to launch.
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Earth hear your Maker's voice, your great Redeemer own
Believe, obey, rejoice and worship Him alone
Cast down your pride, your sin deplore and bow before the Crucified.
"Before You, Lord, We Bow" - Francis Scott Key