Cheers Andy. Spot on m8.

Rhyshrc, my main problem relates to the positioning of the tank decals but it looks like the bottom edge of the blue paint runs parallel with the bottom of the tank so no huge problem there! I could do with a reference point so that I know how far down the blue should be and also, a top view of the tank if possible. Thanks for the offer, very much appreciated.

I was hoping that this forum was the place to go for info and to be honest I'd be pretty stuck without it so I'm really grateful for all the help. Cheers guys.