Is there a way to dig into the xseq to determine what channels are in there?
For the DMX channels that I had from 1 to 512, I built a Matrix model that had 200 pixels (600 channels).
It was 20 wide by 30 tall and a start channel of 1.
When it is in the preview window and you play your sequence, you see all the activity there. It is kind of hard to tell one channel from another at first, but you soon learn what your Arches or Snowflakes look like when the go on and off.
If you add it along with your other Nutcracker models, be sure to either leave the whole column blank or put None,None at the top to prevent overwriting the existing content.