nice, time for new HU.
should put a spacer under ur knob inside the boot to keep it up flush with the finisher.
is dat an iphone/ipod touch your 3.5mm aux cable is hooked up to? if so, check out this app called BBE pro. thing will clean up, widen, and richen your sound. i use it on my earpods and they sound very good through this app.
same maker as the BBE sonic maximizer