Working my way through my set up now. My 3m long ink1003 pixel tree is 9m away from my controller so I figure I will need some null pixels. When I ordered my lights I did order a spare 3m strip as a back up. I'm not overly keen to cut it up for null pixels if I don't have to though. I do have some ws2811 strip that I could cut up. I think these use the same protocol as the ink1003 so would they work as null pixels. Would I need to put in 2 null pixels on each output for 9m or would 1 do. The matrix is powered at the matrix if that makes a difference to whether null pixels are required. I also figure LED nodes would be better for null pixels than mucking around with strip but beggars can't be choosers. I have to work with what I've got. There are 4 outputs on the contoller used to run the pixel tree. Thanks.