That's a brilliant idea!
I'm guessing you're not a biker Digger? If you're into custom bikes, or custom cars for that matter, you tend to follow the accepted ways of doing things -that must go there, that must go here etc. All the best, "out of the box" ideas on trikes seem to come from non bikers for some reason, presumably because they approach the problem from a different angle.
nope, biker , ;running a zrx12 at the mo and my everlasting c90,
im a heavy mech fitter by trade and get some ideas from that, i tend to try and get away from the normal, everyone i know says i dont think straight so perhaps they are right

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K box,s are available from any electrical wholesalers, waterproof, and made outa alloy, not dear either, i fitted hinges though, they are bolt on lids