Purchased a tunnel access panel from AirWard and installed it in the R forward fuselage rib. It required cutting out a section of the rib, fitting the support panel and then the cover. Needed to mount rivets flush with the outboard side of the rib. Primed all the mating surfaces with dupont paints. Riveted into place. This will allow me to access the fuel filter and lines in the tunnel without removing the tunnel cover.