So I cut into the tuxmats today. I figured if I F them up I'd just buy a new set. I am 95% happy with the result.
I didn't want to have the mats attached to the car (via a grill over the opening) because we want to be able to pull the mats often to clean.
So I cut into them and used a black magic marker to color the white foam-like inner layer of the mats.
The ONE thing I would do differently.. was very careful to get the hole centered perfectly. I taped a thumb tack to the exact center of the speaker grill and pushed the mat into it to poke a hole to perfectly mark the center, then cut the exact radius I needed. The only problem. since the mat doesn't stay flush against the carpeted sidewall but rather a half inch off, with the angle standing looking down it it, I should have cheated the opening I cut slightly up to accommodate the view angle looking down. Now a you look from the angle you get into the car, you see slightly below the grill.