Oh, and as far as the door panel rattle goes, if you run any serious 6x9, you'll need to do some trimming on the "shroud" from inside the door panel that contacts the surround on the 6x9. Also, the "Boston" label rattles too.. I showed what I had to do back when I was running Kappas:
Fitting Infinty Kappa 6x9 in the Front Doors.
But..........Since the Helix made so many things possible now, as I refused to get rid of my RER, you can "condense the nonsense" and just run components.