Hey guys
I am looking at replacing my series 1 tail lights on the GU to something a bit better and was thinking GU4.

I know this has been done before somewhere but My searches are coming up blank. I know the shapes are different but by how much and can the panel be cut to suit or will it not fit in at all, as in stick out the side and not have a decent seal?

Has anybody tried this before and if so what was the outcome?