Well, Here is what I did. This is what follows after the metal parts are assembled. and after cutting to shape and sanding edges:
1. Cover front and back with Frogtape
2. Drill holes with specially prepared bit (1/8") or plexi bit
3. Counter sink for dimpled holes in wing HAND HOLDING counter sink. Do not use a drill or machine to prevent chattering of tool or counter sinking too deep.
4. Check that hole is just slightly larger than screw size. Clean all edges with fine sandpaper.
5. Use a tap the thread size of the nutplate (in my case it was a 6-32) and ream out the nutplate threads.
This will make putting in the screws much easier and you can then feel the amount of pressure the head of the screw is pulling the plastic.
6. Cover the edge and over the holes with a sdtrip of 1/2" electrical tape. Then cut or push a relief hole in the countersunk holes to allow easy access for the screws when installing in the wing.
7. Assemble the lens and nutplate holder with thin double stick tape. This will allow the lens to meet the cut out opening in the wing 99 percent flush.
8. Hand screw into wing just bottoming out the head of the screw with very little torque. I used 1/2" screws to ensure if any did vibrate out, it would be visible on the next preflight.
Here's hoping this works. Good luck to all and Happy New Year.