[brucepick]

And thanks to California8Civic!!

I'm not giving up YET. As hinted earlier, I plan to test this version on the highway with tougher tape holding it on. And if the results still aren't good, I can trim away stuff to see if I can improve it.

First, trim the fins so they don't exist at the tail end. Just a straight line from the current top forward corners, going down to the back to meet the spoiler rear edge.

If "no joy" from that, then I can remove every part of the side panels that is forward of the spoiler's front edge, and every part that is above the spoiler itself. So the spoiler would look like this from the rear:

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