stm, i dont work in gosport anymore (yay!), i work in Ryde (my hometown, YAY!)
Happy to cover any costs you may incur posting it. Anyway, drop me a mail and we'll sort something out.
Macavity, thanks for that, but im on the isle of wight, nearly as far from FTW as you can get in the uk!
cynic-al, the disc is fine, its perfectly true on another wheel, and another disc which true goes out of whack when mounted on the hub. I can see that the hub flange isnt running true, theres about 1mm run out (right term i think) on the hub disc flange when you spin the wheel.
There are 2 possibilities as far as i can see.
Hub flange not mounted properly or bearings not square.