Right an update.
My second hand controller came, £40 delivered = bargain.
Fitted this morning on the drive with the car on little ramps in this lovely tropical weather were having and after reading afew guides I thought it was going to be tricky, actually it was very easy. Afew tips, use elastic bands to hold the gasket whilst you get it back in position and get the screws started, cut them oncethere both biting. Tie some string/rope around the rear connector before pulling it through so you can easily pull the new wire back .
It fixed my issue, rear wheel/s locking when Turning tightly at low speed and the car feels like it's dragging.
Oil looked clean (that came out) but ill still renew so it's topped up, I can concentrate on fun mods now!