Has anyone on this forum, fitted, or had fitted the Euroteck carbon fibre rear diffuser to their W211 E55, my homework suggestes the OEM one, is taped on, and removal is via heating this tape up and removing the residual glue for the bumper, then refitting the new diffuser, but some seem to have riveted it on, some bolt on, and few people suggest getting a shop to do it, as its a sod of a job apprently. Any help/advice would be appreciated. CKS performance appear to be the only UK source of these diffusers, if its a bugger of a job, should I get them to supply and fit it?