Here are some pics of the aluminum closure strip I fabricated. It is from 1/16" aluminum. There is a 'U' channel neoprene gasket along the fender edge and a closed cell 1/4" foam strip along the back inside edge (pressed against the 'A' pillar). The five 6 mm studs were welded on earlier in the restoration. This should keep most of the debris and occasional water out of this area. It is easily removable to inspect and/or clean out. Cavity wax was liberally applied to these dark recesses. The "cave" opening was closed up earlier. The small pipe hanging down from the "cave" bottom plate is the new front drain for the sunroof.