I've never actually implemented a sky hide before but I'm doing mine the same way that Reinz does his. Large mirror mounting brackets from lowes secured with #8 3/4" countersink screws. 4 along the back edge of the hide, 3 on each side, and one stop screw at the front so the snake can't push the hide out of the brackets. There's a few threads were he's posted some good pics of them.
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