Geoff, when you jack it up do you have movement top and bottom, side to sideor both? If its only top and bottom then odds on its swival, if it's only side to side it will be in the steering and if it's both it's in the bearing/hub...
How much play have you got? Is there a rough feeling when rotating the wheel (feel the spring, gives the best feedback on rough bearings)?
Oh yeah, why I remember, mikey and coppin, I was out laning last night with one of your mates that's also a mate of mine, Barry lymer, it's a small world, he kept going on about 'my mates got this truck with these bits on it' and I was thinking yeah. I know someone with a truck like that...