Newrider, that article is extremely helpful. Never crossed my mind to make a cardboard template and then measure it. I just threw out a great big sheet of cardboard, darn it.

flynrider & gsJack, it doesn't look like the Plexis (plural = Plexii?

I am sifting through all the sites and suggestions, then I'll go park my butt on a couple of outfitted silverados at the dealerships, hem & haw, think, scratch, and let y'all know what I decide. If I ever take the plunge to use photobucket, I may even post a pic, finally.

I just love TMW! This is so helpful!