OOOOOPPPS.....
I've seen it recommended several times to use the "careful oven method" to remove the lens.
I was able to get my project out of the rear of the headlight, so I didn't 'need' to remove the lens (from the black headlight body).
I had a spare headlight laying around from the swap, though, so I decided to try it.
I carefully brought the oven up to temp, using a thermometer, but as you can see it DID NOT WORK!! :)
I am pretty careful, so I would try alternative methods at all costs before attempting the oven to loosen the bond between lens cover and housing.