The 5dBi that I have seems to be enough extra signal strength if its on the roof ( Though a little extra wouldn't do any harm ) I would just really like to find a way to disconnect if from the computer so if lightning does hit the antenna the Mac doesn't melt.

Other thought is there a surge protector of some sort suited to slotting in the coax somewhere that would protect the puter???

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Stoner & Webber 2011 World Champions