For a year, I felt my steering was not what it could have been. It always seemed slightly heavy. self centreing, included. I always seemed to be applying a permanant, minute, right hand down. :Until: The MOT. It was noted, on the advisory. That there was slight play in both lower ball joints. I had these replaced (£250). Had an alignment check. & BINGO. What a difference. It felt a completely different car. The self centreing & steering was lighter. With no more right hand down. If you do'nt change cars very often. This is what can happen, when you do. I had no mechanical indication. ie. rattles. Other than above. I hope this may help certain members.