My first year with pixel, just finishing up design and build. I have my main unit using a Falcon F16V3 with three power supplies, and then I have 2 differential receiver setups about 150' and 175' away that will run lights on a separate building from the main house. I am assuming that the two power supplies that will be powering the pixels attached to the diff receiver do not need to be common grounded to the main units power supplies. Am I correct in this assumption, and if not how to I ground them together at such a long distance? I am using one of the main power supplies to run the Falcon controller, and the other two for power injection, then in the differential setup I will use both power supplies for power to pixels. Am I missing something?