Has anyone had a problem with their aftermaket HU after replacing their BOSE factory HU without an integration adapter? Do I absolutely need this: http://www.crutchfield.com/S-y8pFgAZ...N03&tab=review??? Has anyone replaced a factory BOSE HU with an aftermaket without using the integration adapter and had problems? I looked for one on ebay and they dont have one? What other piece could I use if I absolutely need it?