The great divide :)

[Slick]

Alright guys, I have decided to quit playin around and go on a remove my back seat. However, I need to throw an idea at you guys and get some feedback. Here is my crappy paint representation of what i'm trying to go for
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My goal is to cover a piece of plywood with some speaker box cloth I have lying around. I plan is to use a piece of angle iron attached to where the black mini frame is bolted to the car. Then bolt the board to the angle iron. I plan to custom cut the board to fit the nooks and crannies of the wall of the car. I dont plan to make it any taller than the bottom of the window.

So, what does everyone think? Does this sound doable? Any additions or changes? thanks for any comments