Wow, I can't think of a better approach than yours. For those of you that don't know those magnets are very capable of holding it together. The only thing I would wonder is how good is the seal. Depending on where you drive it you may or may not want to put a gasket or a rubber tube around the edges. It occurs to me that the rubber tubing used to set screens would work great.

I am not planning to drive over water yet, but maybe I will do that some day later when I have more time.

Did the same with vecro, 2 months later, cracked hull in half at front of engine mount, and suspension on tiger I, good luck, top and bottom screwed together makes the hull stronger, without that support it twists the hull the before suspension works!!!!!!!!!!!!!!!!!

Where do you run your tank? Any other modifications? Probably adding reinforcement will be a good idea since I am losing some torsional rigidity