John,

Red Lion has nailed it down for you. And looking at your signature I'd say you're pretty close, too. You could maybe shoot a 400 spine, but generally speaking if you err with carbon arrows it's better to be on the stiff side.

And never ask a dumb question. There aren't any. You'd be dumb if you didn't ask. Helping others learn is what a lot of do on the forums. Always eager to pass along what we've learned.