applaud him for hacking up his car? LOL. im all for people working on their own car, but theres no need to "modify" parts for such simple tasks.
are you going to take a holesaw to the boot trims when you cant get the tail lights out?
for anyone else who sees this thread and thinks what you did was a great idea, heres how its done. rather easy, dont really even need to jack the car up or remove inner liners. just push them out the way while you undo the 2 bolts.
https://forums.justcommodores.com.au/threads/wm-caprice-high-beam-light-upgrade.151347