Well, I finally got up enough courage to cut it...use the blue painters tape to mask it off and then marked my location. I then oh so slow and carefully cut the rail leaving a pretty clean opening. Didn't know it at the time but the piece i removed was perfect for the backing of the light and just used 3M decal tape to secure it and then the light with the same tape to that...a little black 5200 around the openings and she's done....super brite....