Hi Peter,
Glad your pleased with the result so far. I am considering oval rears in the Roadster, I have not looked into the difficulty of doing this yet, but presume it will be seats out and then careful cutting of holes with a suitable coping saw. Maybe speakers in the sides just rear of the door might be better, depends on depth available though. At the same time I would treat the wood floor to some protection and then make thin wood strips for the seat runner to accommodate the protruding bolt, so the seats would then slide properly.
I have next week off work so it is up on stands, and a good clean underneath, then make corex inner wing liners and fit, and a general grease up and nut bolt check. As I have already done over 4.5k mile since buying in July, a bit of TLC is in order.