All I have left before I pressure test the tank is to seal the inspection cover.  To secure the inspection plate to the rib, I ordered some 18-8 stainless steel 8-32 x 5/8" hex head screws.  The hex head screws will be easier to remove when the tank is installed on the airplane.  I have seen other builders do this and it is also recommended by Van's 21 years of the RVator.  I thought is sounded like a great idea.

I decided to use the cork gasket AND tank sealant.  By using the cork gasket, it should make the inspection cover easier to remove and using the tank sealant only on the edges, should act as a redundant sealant barrier.  Before I installed the cork gasket, I lubed up both sides of the gasket with ez-turn lubricant I got from Aircraft Spruce last week (5 oz tube).

I installed all of the inspection plate screws and washers and secured them alternating from side to side.  I couldn't find any way to use my torque wrench on these so I just tried to provide a consistent torque "by feel".  I removed all excess ez-turn lubricant from the edges of the inspection plate.

I mixed some more tank sealant and made a fillet around the edges of the inspection cover and the hex head screws and washers.  Since I am taking credit for the cork gasket to seal the fuel tank here, it isn't imperative to have a perfect seal so I didn't get to crazy with tank sealant here.  We'll see how it goes after the leak testing.

With all of the effort I have put in around the inspection cover, I HIGHLY doubt that this will leak.  My order of additional AN caps and fittings from Aircraft Spruce is supposed to be here on Tuesday.  Hopefully, I can start testing the tank Tuesday or Wednesday.  Leak testing the tank is the last thing I need to do before mounting it to the wing.