[Ivan Helmrich]

I was on the crew that set up the GKC field. As far as I can tell, it was indeed the regular protective sheet that comes on polycarbonate. I asked about its removal but was told to leave it on by one of the crew leaders. I remember commenting that it was unlikely to last for more than a regional or two. It may well have been a case of the extensive field setup instructions not calling for it to be removed, so on it stayed. I haven't read much about vision system problems so chances are it made little or no difference other than to the human players.

Ivan