Quote:
Originally Posted by aerohead
If they close the ends they're infringing on another patented deflector.It's not as good a design,but cheaper to make and sell.
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For a DIY solution to closing the ends, some careful cutting and a little origami would turn this quickie sketch into a nice foil I think...
...then caulk or plastic-weld (depending on material) the seams and you're set.