The only item I regularly address on Cannon cabs (at least for lead-capable units) is the provision for mounting microbulbs for headlights on the numberboard housing. The area inside the Cannon numberboard housing is open, which leaves very little material for bulb mounting. I fix this by creating bulb tubes to mount inside the Cannon numberboard housing. Start by gluing together two short pieces of Evergreen #223 .093" styrene tubing, as seen in the photo.