Paul, just for reference:

Hannibalito III
(L)35cm x (W)45cm x (H)20cm

That is a real Featherweight not a vapour one.

You come up with a heavyweight vapour of 50x50x26, and you want to shove more motorpower in there than a Fiat 500, a pnumatic weapon, and the bottle(s) to feed them.

That is not realistic.