Thanks for all your input.
It's deffo FS2 gearboxes but take onboard the comments re: tower mounts. However, I had the same issue with the kit plastic mounts and the kit camber spacing (2mm washer IIRC).
Does anyone know of any angled ball ends which would be suitable, as I'm unable to add any washers under the outside without either binding the wheel up or restricting droop. Will have a look to see how the dremel might be able to help.