My friend Larry Geiger came over yesterday to help me seal my tank with ProSeal. Larry had completed an RV12 not too long ago and he had some experience with ProSeal on his RV12 fuel tank. Over the last several weeks I worked on preparing the tank for sealing. I cut both holes for the filler cap and the fuel sender. Attached the corresponding nut plates and prepared the fuel sender for final installation.
I made a few changes to how the top attaches also. While using the EAA chapter metal break to bend the end flanges on my tank top, I decided it might be easier to mount 1/16"x3/4" aluminum angles to the inside side walls at the top and use them as a mounting surface for the tank top. I think it turned out well. Bending the flanges to the sides of the top would have been possible (just like I did for the bottom), but not nearly as easy to construct.
I purchased solid pull rivets from Hanson Rivet & Supply Co. (800-777-4838). I needed 3 different grip sizes to complete the project. These rivets are on the pricey side, so be warned. You don't have to use this style of rivets, but they don't have to have their centers sealed like regular rivets do.