So I've finally got one of my pixel controllers working, the ECG-P2 from J1Sys. I have 2 of these and may be able to get away with doing the entire roofline from one, but I have the 2nd if needed or if I want to expand next year.
Managed to get the new strip working too. Just now need to properly connect up the board to the controller using actual wiring and power injection. I've also started fitting out a controller box. As this will have many plugs coming out for power injection across the roof, I've had to use a cable gland in addition to the existing cable access holes in the box. The plan is to test the full setup in the mancave before mounting on the roof, as it's obviously much easier to fix any issues at ground level!