Bryan's Bane will be the death of me. I've given up on that approach and am taking a break.
Meanwhile, I've started mounting my nav lights. I have a nifty set of 3D printed mounts courtesy of Kevin H. I think he has the design posted on thingverse. They are for Whelen Orion 600s. Here nutplates have been added and one baseplate screwed on.
Light mounted:
I used the spar wingtip mount rivet line as my vertical reference. They are slid down far enough that I can't see them, but they are not masked by the wingtip when directly above.
I am considering cutting out the outboard tip ribs between the lightening holes, like we do for flap access. That will let me get access to my molex connector through the landing light hole. This way I can depin the connector if I need to remove the light. I have a piece of 1/2" OD poly tubing from the behind the mount through the spar tip to route the wires.