Hi, can anybody advise me as to how to remove the riser bar in a new Coachman Pastiche, we have changed the shower head to an EcoCamel shower head. Because the head is slightly larger than the standard factory fitted one the "holder" creeps down with the weight. Im usually very practical but Im struggling to work out how to remove the riser bar from the eleptical backplate and dont want to break anything. I look forward to your replies.