I tried to remove my roll hoop covers at the weekend as I suspect the long standing 'ticking' noise I thought was from the rear deck or boot is actually the passenger roll hoop cover. While the outer edges appear to prise apart easily (they appear fixed together with rubber sockets and plastic tabs) the inners appear reluctant to come apart and I really didn't want to break anything so gave up. The hoops have the wind deflector (the bits inside the hoops as well as the detachable part) and it felt that it may have been these sections that were reluctant to come apart. If I can get this off, I've bought some sticky felt that I plan to put on both hoops to prevent any further noise from them.