A up Trinny, i recognise ya avatar

, btw hows suzanna.
Anyow fit the rubber to screen, feed some strong string around and in the groove where the metal lip will fit leaving an overlap on the bottom edge, place screen/rubber centrally onto bottom aperture lip (string inside), from outside exert gentle pressure working from bottom, then sides, when the screen no longer moves in, then pull the string (one end) slowly while pressure is applied to the area that the string is pulling the rubber lip over.
Do ya get me drift, this all works better if you can work with the rubber warm, but watch inside for the rubber pulling over the lip, then.........jobs a good un.
214si wrote:is that because of the 'ears' on the mk2 rubber which causes it to leak, also why would an aftermarket mk1 rubber not leak and a mk2 leak?
, the reason why mk1 rubbers dont leak is the silver locking strip.