Blimey - is that series still dragging on? Has he got the chassis running yet?
I certainly wouldn't superglue a whitemetal body together. I'm sure some people might get it to work, but me and superglue never get on! I think in your position I would use epoxy resin, preferably the slow setting type. I find that 5 minute Araldite doesn't set rock hard unlike some of the slower epoxies. You don't need great gobs of epoxy, just the same amount as if you were using a contact adhesive.
Of course, soldering is the best option, but if you're not confident then you really need a temperature controlled iron. Apart from anything else, overheating 70 degree lowmelt solder can release some nasty substances.