Cheers Eddie! Yep, knox carpet.
I couldn't find a single speck of info about underfelt, placement or where to cut it.
Have you got any images at all of factory placement?
I was also under the impression it only went in the foot wells, but as I said, when fitting it it was really really loose around the gearbox tunnel.
I might have a bit more of a play around tomorrow and see what it fits like if I thicken up just the foot wells.
And yeah, might even do it the radio wiring tomorrow.