We purchased a Premium a couple of months back and wanted to upgrade the LCD screen from the 6.5" to 8". I was researching and noticed that the display unit (Part # 86201SJ630) with buttons appears to be all one piece. I wanted to know if we buy a 8" would all the wiring components be plug and play. Also, if the dimensions on the unit are the same and would we run into any issues swapping the unit as long as they are OEM genuine parts. Any assistance is greatly appreciated.