Ok guys, FOUND the problem of the locking up wheel when i tighten the spindle nut ..... BRAKE SHOES THE WRONG WAY AROUND !!!, in my defence, the bike came to me with this problem, so the shoes had been put in incorrectly some time ago, i just took notes on how they came out and replaced the same way !!! tut tut, should have checked,ALSO the play on the spindle was due to the bearing not pressed home enough, replaced with new sealed bearings, now to bed those shoes in again !