I painted the amp mount and added a support bar at the top left to triangulate the whole thing. It was incredibly wobbly with the amps actually mounted to it. All the power wires and speaker wire is ran. Signal wires from the head unit are in the main harness I'm making. I ended up only needing 10AWG copper wire for powering the mono subwoofer amp even though it is rated for about 300 watt RMS output. The run from the battery was just so short.