The retaining strips were sprayed with primer, and then attached to the lense with double backed tape. I installed the lense with the #6 screws to check for final fit. The lense is difficult to install wth the light mounting plate intalled behind it. I have room to trim another 1/4 off the lense or up to the retaining strip on the bottom side which will make installation easier. Finished the day by adding a countersink to the wing rear spar while the wing was on the table.