You're very welcome! I was averaging ~37mpg before doing any mods, and my high was ~42mpg on one tank. I just realized I have a new version of my grill block, using aluminum roll flashing, that i should photograph and post.
I don't think the spoiler is all that helpful; and if you were to make your own, slightly larger (a mini-Kamm back) that curved/angled down more than the stock one, you would do better. The method they use to fasten it is a good thing to use to attach one.
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