10.0s at 570HP? Must be heavy. Will it always go 10.0? No plans to step up? No plans to ever sell?
If it's that close to going in the 9's, if you think you may step up at some point, and/or if you think you may sell it someday, yes, get a tag on it. Then it's done if it goes into the 9s for whatever reason. That and the car is about worthless without a good tag. Otherwise, not needed.
If the results don't match the theory, change the theory.
