DOH!
Made one small mistake, my hand slipped when I was pulling on the carpet and I accidentally bumped one of my "subwoofers" with my elbow, denting the dome.
My knee jerk reaction was to immediately look up the difference between oem replacement and an aftermarket. I believe I have the "Carver" system, which as far as I understand it makes them much harder to replace? I never did care for the bass in the car, it ends up sounding very muddy and flat.
S645A BMW US Radio
S677A HiFi System Professional DSP
Beyond that though, cold or no cold I'll hopefully get the car completely re-assembled this afternoon when I'm off work.