Just remember Mark that the way your breathers are( coming from the top of the wing through to the bottom of wing) that any fuel vapor will hover along the bottom of the wing and enter the cabin that way whilst the plane is hangered. This was a problem with the early Savs( VG model) not as bad with the XL but it still finds its way into cabin. Everyone do your best to never spill fuel while refueling, it does take along time for the stink to leave the internal parts of the plane. Gundy