I took a short break...not sure if I really had the energy tonight to deal with the joint plate. So i decided to try to open up the left wing tie down hole. Again slow and easy was my approach. I worked exactly according to the plans and used a file to re-center the factory hole and open it up. Then I used a unibit. I was careful not to get the unibit too deep and cut into the tie-down bar.
At the end, I uncleco'd the leading edge to use the unibit on the final cut....just to scared that i will chew into the tie down bar. I'm pretty happy with how good it turned out. I think i'll open it up a tad more just so that there is some clearance for when paint is applied.