nah lifter looks shit house - as Balistc said: go to bunning and the clips you need a like 2 bucks a box.. colour code them for different wires and the next time you go the drags clip it off and take out the box. Bit more messing around at the start but heaps of benefit in the future.

I got mb quarts in my doors and you dont need sound proofing.. sounds good enough.