Is there a guide anywhere on how to change the rocker cover filter, got one to do this winter and want to do it ourselvesI can say that changing the rocker cover filter on a swb t7 is no easy task. If took 2 of us the best part of a day to do it. Everything around the rocker cover has to come off to enable the rocker cover to come out. You can really see where the hours dissappear to.