Thank you, but no. Essentially I'm working on a fixture. WS2812b are serial, should one LED fail, the rest after also fail. In a fixture this would mean any subsequent fixtures die also. I want to therefore remove 'n' pixels data, and pass the rest on, so that should any pixels fail (and they do, especially if your not careful in the assembly process/heat humidity etc) it doesn't kill anything further down the "chain" if you like.