not so tight! Fix the drive side (LH threads!!), and ease up the non drive until all play is **just** gone, and then lock it off. DO NOT, do the cup up tight and tehn lock it. If you can't eliminate play without it rumbling then it sounds like the bearings are shot. . . .
hope this helps,
they key was i didnt realise you have to have a seperate tool and had to do the lockring, i was jus ttrying to screw it in with the BB tool i got with it, will have another ago when the apprpraite tool arrives..... cheers for the advice, this forum is amazing