Hi again,well car went through MOT and one of the front tyres was an advisory as it was quite bald on the inner rim driver's side.So today I got a new tyre fitted and saw an offer at National Tyres for half price tracking so I popped in to find out more.Well it was half price on the front but the back needed doing as well so it would be £45 so I said carry on.When I saw the gas bottles come out I thought he's struggling and soon he came in to say the back was seized and he couldn't do them without breaking them.So on to the front and gas bottles,hammers,chisel etc and a lot of time he managed to move them a bit and earned his £15 but it seems therefore it all needs replacing.Firstly is it a DIY job? Any hints or tips? Parts required? and then after done back and get it all tracked better as the car wants to go left.As always thanks in advance!!!!!