I did some more sanding on the tail cone sides and flattened the aft tail light section so that the tail light adapter would fit better. I drilled the holes for the adapter ring, drilled out the center with the unibit and installed the adapter with the pop rivets. I then installed the light with the two 4-40 hex screws. I am happy with the way the tail light fits now. I might fair it in a bit with some glass but maybe not - we'll see.