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Old 01-09-2013, 10:24 PM   #34
DarkCobra
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In my case, the stone required to hold down the foam island was as big as the island itself.

Even if I could have attached the island to the suction cups more securely, I don't think I'd trust suction cups to not let go or slide up over time, at least those small enough to be inconspicuous. Magnets with a non-slip coating should work better. Lead or bismuth weights embedded in the island can cancel buoyancy with a size I've estimated at about 10X smaller than the foam, so easily concealed within.
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