So the original owners of these wings had started a home-brew landing light solution back in 2007. 2 halogen lights in a skinny home-made mount and a elliptical hole in the leading edge. 13 years later the FlyLed lights are available so thats the way I'm going. The existing leading edge holes are 6" wide rather than the 5" that Duckworks has on their template, so I had previously talked to the guys at Duckworks about maybe needing oversize lenses. They said that they thought the standard lenses would fit, since they recommend a min 3/8" overlap on the sides and their lenses are approx 7.5 wise before trimming. I also knew I would have trouble if I tried to use the standard Duckworks mounting plates, since the boys had already drilled holes in the ribs for their home-made solution and there was no way they would line up with where Duckworks wants you to drill them to match their mount. Ordered just the lenses from Duckworks, and once they arrived, I measured and confirmed 5/8-3/4"overlap on the sides and at least an inch on then ends. Once I was sure I could clean up the existing holes, I cut a new hole, then did a LOT of measuring and CAD (Cardboard Aided Design) to layout my own mounting plates from sheet stock. It was surprisingly hard to get brave enough to get the snips out and start cutting on this wing, and there was a ton of measuring, staring, drinking coffee, measuring again before I just went for it. Turned out fine.