Sorry, forgot my camera and only had my phone, but the shop started on the job this morning. I'm copying someone else's pics basically for the sub box.
Here they were marking the mold for cut lines, just before removing it.
Here was the mold removed, and ready to be trimmed for mating to a speaker board.
I'll update as it goes, but for now I arrived at the shop this morning at 11am, and they first pulled the seat and folded the carpet back. Then they marked and cut the front section of the storage well out. It's about a 12 inch section they added, which allows the box to hold a 10" sub.
They will be adding a MDF cap to the mold, to make it sealed, and then adding my 10" pioneer TS-SW1041 sub.
It will probably be another couple of weeks before they are finished, and I may not see it again before it is finished, but if I do I'll get a progress picture.