Last year i ran my show on one of Alan's RPI-28D+ and used both channels for roughly half of the display each with all the props in series with the data and it worked well. This year i've moved to one of Alan's HE-123 MK2 16 channel boards with the plan to run each section of props on their own channel. The only thing i just had a thought on is my gutters which are about 15mtr's long, should i run them all off the one channel or is there any benefit of splitting them across a couple of channels?