For anybody that's done the mod, I'm not following the 4mm cut line requirement mentioned in the instructions. I watched the youtube video also, and I'm missing what is needed.

Do I just need to draw a line on the bottom of the grill opening 4mm from the back where the old grill mounts and then gradually work that line to the top corners on each side?

Also, they mention a 5mm measurement for the tape. Again, I'm assuming that I measure 5mm from the backside of the top opening to get the tape in the right place. The pictures they show are horrible and the video zooms in and doesn't really show what to do.

Thanks