I am hoping to get into the pixel game Christmas 2015. I am starting to order some initial components as I learn a little better by playing with things and reading while I go. So far I have 1 strip of ws2811 12v pixels and a 360w 30a power supply. I am looking to order an e6804 and I am a confused as to what the difference is between assembled/tested and not assembled and tested? Can someone please explain? Thanks a bunch.