After having a look under the car a couple of weeks ago I noticed the rear subframe is rusty. Most probably an MOT failure so I'm looking into swapping the whole thing out. Having seen a few S3 subframes going on eBay, does anyone know if they are compatible? I assume the control arms are longer to allow the S3's wider track? What about hubs and trailing arms? I'm hoping to build a completely reconditioned subframe assembly on a bench at work, then just swap out old for new one weekend.