Hiya, A geometry check need not be too expensive. But rule out the obvious first before spending money. The other suggestion I have to check for accident damage is something I picked up. Its a bit crude and will not tell you everything but its worth a try. Get a long tape measure and measure from wheel centre to wheel centre on both sides and then compare with specs for your model. What you might find is that everything is ok or you might find the wheelbase is out of allignment. As I say its very crude but its a pointer. Checks dampers and all the bushes for the rear suspension assembly and see if there are any obvious signs or damage due to RTA or some monkey of a mechanic. Again I know this sounds silly but double check your tyre pressures with FORD. Although if they are underinflated the wear would occur on both shoulders of the tyre. The fact that the tyres are wearing exactly the same way on both sides would suggest the toe out is wrong. Are you carrying a load of weight in the back regularly?? Someone suggested springs being faulty I think this is unlikely but has someone changed them for a different set. Finally do an HPI check on the car to see if it has a V23 report on it (Written off serious accident damage) Hope it all works out for you. Please post the answer if you get one Link to HPI http://www.hpicheck.com/newfrontend/?supplier=goog