Hi everyone, About a year ago I had the NA Tuning Package fitted with Tuning Developments and also took their Super-Resonated catback exhaust.  All was very well for the last 10k miles which I have done since then, however over the last 1k, I have been getting a tin-can rattle under acceleration, just past 3000rpm to redline. (I am driving very conservatively since , below 3000rpm, to prevent any further potential damage.) The rattle occurs under heavy or light acceleration but not when revving in idle. Also occurs whether hot or cold. With the windows down it sounds like it's coming from the rear-right section of the exhaust but with window up it sounds more forwards towards the engine bay. The exhaust also keeps slipping left off-centre which may or may not be related, I can easily re-position on the 4 rubber guide hooks, but then after a couple of drives it has vibrated back to the left of the valance. As far as I can see, the rear of the exhaust looks OK, but I can't really get under the car to look properly at the rest of the mid section and nuts/bolts etc there. I guess I could lift one corner using the wheel jack, to try and get a better look, but I don't know how safe this is? I did e-mail Mike who is more than happy to take a look at the car for me, however I'm about 4 hours drive away unfortunately.  I also have my MOT on Friday and it is due by end of month, so I'm considering taking it to somewhere like kwik-fit or the likes to be looked at properly. Any recommendations much appreciated!