I got a good bit way through sanding the belly seam in preparation of putting on a layer of bid on the underside. I am still leaning toward putting a layer of BDM on the inside belly seam. Pics did not turn out well. I did share this bucking bar design with Jim Nelson a sportsman builder in MN I met at Oshkosh. It is for the rivets by the strut attach beam and it worked for me like a dream.