Very valid concerns mate. But if done the right way, i dont think there should be any issues. ( The all too familiar error is to be avoided - i.e when opening and re-fitting a dashboard , there always remain one or two screws/bits n pieces which seem to find no place for fitment and then the various rattles start. Make sure whatever comes out , goes back in) The old dash removal and installation of the new one should not take more than one day at the service centre. That is a conservative estimate. Keep us updated about the progress.