Thanks for the answers. Not sure what a separate controller brings, am I missing something? Pete, the 2 sets are made about 3 months apart, they are identical in manufacture and chip set but the consensus is the leds will be a different batch. I think I’ll be getting them as they are identical, at best I’ll be able to combine them at worst I’ll end up with tow walls the same. Have you experience in using a camera? If so what have you used. Only experience I have is with one we used for balancing thin bezel Samsung walls, but er never had success with it, spent an hour calibrating and it was better before. Thanks again