My Stilo failed its MOT on front spring and wishbone issues. I've sorted out the spring, but the wishbone is causing problems as I don't know whether my car has the 12mm or 14mm bush size wishbone. How can I check this - I'm not clear about which bit changed size - is it the bolt that holds the bush in, or is it the bush itself? Thanks for any advice! I don't want to take it off the car until I have the replacement, as I need the car while the weather's crap!