After several faile attempts to come up with a tank hold down system, simplicity turned out to be the best. We simply added a filler plate behind the installed brackets and secured the filler plate and tapped the hold down strap fo 10/32 machine screw. worked out great. no more fear of the silicone adhesive letting go of the tank. (Mfr's solution) it weighs 3 oz. Now all we have to do is install the fuel port and the quick drain and the tank is complete.