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Old 07-03-2014, 02:51 PM   #5 (permalink)
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Dusty - '98 VOLKSWAGEN Beetle TDI
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I would spend lots of time developing the kammback before fabricating one.

You need to simplify the installation and mounting method to a point that no one could improve on it, at least without great effort & Knowledge.

Off hand I think silicone mounted would be enough, if you gave it lots of surface area to adhere to , and designed it to be self supporting (hooked in rain gutter etc.). My Aftermarket rear top of the glass roof spoiler is mounted with silicone as per instructions.
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