got an email from craftics - my glue should be here on 8/5
can't wait for it to arrive so I can weld together mine and test it out
, to be on the safe side, I ordered three viscosities of Weld On ... #4 which is water-like, #16 which is a thin gel and #40 which is a 2 part epoxy like material ... The #40 meets some sort of DoD spec for strength and durability, so I'll probably use it to join my inner and outer boxes.
dusty - I also plan to have 2 nylon screws going through the part that hangs on the tank, pressing down onto the lip of the tank, so I can raise and lower the box in relation to the tank, hopefully to give me a little water level adjustment ability.