It was recently requested that I make an amx 50 series tank. This tank comes with and auto loading drum mechanism. I have managed to model a magazine for the cannon but my problem seems to be that the magazine for the cannon is to big for the turret. Ive managed to make the magazine have 4 gravity fed shells which lead to to a 2 shot drum. I want to extend the magazine but it will be to big and shrinking it will require a whole redesign of the mechanism. Should I just build another tank, shrink the mechanism and hope it fits, or rework the auto drum to hold 4 "shells" ?