Just received delivery of my rs parts diffuser today. Just wondering what others have done when fitting. In the instructions it says to remove the bumper but I'm sure I have seen a thread somewhere, where it has been taped into place while the bumper is on. Has anyone done this? Also has anyone else who has fitted this drilled the diffuser and screwed the diffuser back into the original holes or is it just a case of tiger seal into place? Thanks.