My 08 GTS has the dreaded/awesome panoramic sunroof. I've lubed up the tracks with dry Teflon as recommended here, but it's also leaking between the first and second panels. As best I can tell, this part is the one that would need to be replaced to fix the leak. (part no. 955-562-914-00) Does anyone know HOW to replace the pano roof seals? Given the cost of replacing the whole unit, I don't want to screw this up.