I have a question regarding corrugated iron roofs. So I had my twenty WS2811 stars (from Ray) hooked up to 19m of WS2811 strip light connected to one of my P2s setup in the garage and all worked nicely. Then I transferred everything up onto the roof, got everything in place and turned on the P2 in test mode to behold my roof lit up in glorious led colour. Instead, my 20 stars lit up and only three leds on the next strip flickered away sickly with the rest of the strips dark. I was injection power left, right and centre so wasn't sure what was going on. Now admittedly I had 6m of 3 core cable going from the stars to the first strip light so my thought was, data problem (even though I had happily gotten away with 6m cables last year although that was down on the ground). I bridged the gap between the stars and the first strip by hooking in another 5m strip and low and behold, the roof was aglow in glorious light. So then I connected 3m of three core cable (tried two different ones) from the stars to the 5m strip and the roof was flashing like a crazy disco. So it would seem that I am not even able to use 3m of three core cable bridging gaps between lights as the data seems to get corrupted very easily. 3m cables used last year down on the ground never caused and issue so my question is.... would the fact that I am on a corrugated iron roof be the reason why I cannot use even 3m of cable between the strips due to the metal roof causing interference or is that just a crazy notion?