I carry a first aid kit but I don't put it under the parcel shelf. If ever I need it (hopefully never) I don't want to have to spend half an hour removing luggage, carpet, ply cover, etc. to get at it. I'm actually thinking of cutting the carpet in such a way that the cover can be removed with the top part of the carpet still attached to it. The near vertical part behind the seat would remain studded in place.
That's what I've done. No concerns with originality for me.
