Put cork strips on fuel tank, cut hole for fuel filler cap and drilled holes in bottom for vent tube fuel drain plug. As you can see in the picture the fuel filler cap does not fit flush on skin. contacted Zenith to question why, and thier answer is that when welding in the fuel filler cap, the metal warps. The fix is to take a piece of hard wood and bend it into position. It is a trial and errorto make the filler cap flush. Christa helped me getting the skin to lay down and come back up as needed.