Been following the install-very clean. Congrats-I'd say you just surpassed 90% of the shops in Tampa as far as cleanliness of install (I'll keep this in mind next time I am hiring for the installer position again).

Anyway, only thing I would do (since you have good trim skills), is to add the fake cover over the top of the amp/sub box so that just the top of the amp pokes out-covers all wiring. Also makes a great place to add intake/exhaust fans to cool the amp. And if you want people to see the batteries, but not stick out like a sore thumb, lid the boxes in smoked plexi (or sometimes we just tint a small peice of clear with 30% to save time). You could even add a small tube lamp inside each lid low in the box to give a glow effect. Other than those two additions, don't see much I would have done differently. Unfortunately however, it still is a Caddy and you will still be fighting the trunk divider/shelf dampning. I think with your skills you could have easily ported through the rear deck. That alone is probably worth a few db in the cabin area.

Nice work again though....