Hi everyone. Replaced my DV today for peace of mind and now my surging issue has disappeared. Didn't think that a faulty DV would have caused it but touchwood its ok now but may have just been coincidence and it will probably happen again soon. Also did the N249 valve bypass mod whilst I was there. DV is definately working faster and gear changes smoother than before. Very happy with the outcome.
One more question I have is regarding the DV fitment. Can these be mounted / fitted the other way round and if so what are the benefits of this? cheers