I cut up a ton of shit.. I also mutilated the shelves to make my own compartments, intake covers (internal), shelves, and doors to the util division. I wont bore you all with pics of those items but have them if anyone is interested please ask...
Next I covered the entire cab in FatMat for sound insulation. I got 2 100ft rolls. Kind of costly at $260 including delivery. I put one layer all around and 3 layers around util area where fans and ducting are. I also created "pillows" in that util area by laying flatmat and hanging dense memory foam with ahesive on top of the fatmat, then one additional later of the fatmat over that. Hard to explain check out the pics...works great though. Also wrapped the ducting with a layer of the fatmat..doubled up on the 90's. Added about 45 lbs to the unit so it will be a pain to move. I will be moving to Sin City in Nov so im not looking forward to that moving these but it shall be worth it.
Note: The Fat mat site says doubling up increases sound dampening by 3. I also wonder if it affectes the heat signature. My buddy is a nuclear engineer and has a heat gun used to look at reactors. I will borrow it and report back. Don't really need the heat signature security though as I am only using 1 600 HPS with a colltube and some T5's for veg...