Couple of things:
- the BMW floor weighs 5 pounds. The new floor and amp cover together weigh 10 pounds, so we added just 5 pounds with the trunk parts (plus the gear, of course - but those wooden parts were birch plywood for lightness)
- the Technic harness was of course used! We also ran wires into the door.
- we ran 4ga from the battery to the 1000 and another to a distro block, and 8ga was
used from the distro block to the amps.
- the amp rack in the corner is the one we tooled and is part f some of our prepackaged systems.
You can get a similar system for local install with plug-and-play parts and preprogrammed amps.