Had trouble with irregular display. Thought it was my splitter modification. I have 10 large circles and had fitted a "T" splitter between them to get up to max pixels in universe. Each circle has a 4m lead from the splitter to the first pixel. Maybe pushing the distance but worked OK for a single model but of course the signal to the next model in line has to travel UP 4m then DOWN the next 4m, thus 8m between pixels. Time for this Kiwi to install a null pixel at the start of each lead. Lesson learnt.