Scale Tank rebuild, what motors to use?

Hey Gustav, hows tricks? cheers for the link.
Yup it is a right result indeed....It will take all the guess work out being able talk to people that have done it before........and no shipping to pay, that will be a first:dft012:
I'm abit restricted on what I can fire out the end though....this is England after all. but there are still a couple of choices.....paintball gun maybe, shotgun blanks are another, but again you need a firearms licence......suggestions on a postcard pls