I added a small amount of fuel tank sealant to the backer plate and clamped it in place. I checked the hole alignment with a 5/16 bolt. I waited until the fuel tank sealant was a little thicker before adding it to the gaps in the drip trays. Passed experience has taught me that it will run like nobody’s business until it starts to set-up. I also added some tape to the underside...not sure how this will turn out, but I'll give it some time to set-up.
adde fuel tank sealant to fill holes
taped bottom to keep sealant from dripping through while it cures