Hi Nick,
Thanks for the post, yes I have already looked at Daniel Boss's site, very good site indeed, most informative. I do agree with you that I think the 3.5" round version tank is definately the one to go for but it's just finding the dam thing!
I have an old tank which I believe may have originated on a fleetstar and looks to roughly have the same profile and shape of a spitfire tank, although slightly larger. It unfortuantely has no indents for the badges and a nasty dint on the left handside. It's my intention to spruce this up and use it till the correct one falls into my lap.
Regards
Bruce