I received my new position light / strobe for the rudder today. I removed marked the rudder tip for hole locations and drilled pilot holes. I drilled the backing plate and the fiberglass for rivnuts and I used a dremel to make the large hole for the light body. It took a while and wasn't fun, but I didn't have a unibit.Test fit and it looks good. Routed the wiring and riveted on the rudder tip.