By the way…
The real one is going to be made out of pretty thick lexan (specs anyone?).
But… I predict the one in the center at one event (at least) may break/crack if someone lifts up very hard on any one Spider Leg on the middle row for any reason at all (intentional/accidental).
Just something to think about.
Play hard & play fair, but go easy on the field ok people?
That lexan disk is very thick, but from what I tried at kickoff in Manchester, NH, lifting on the Spider Leg makes for a heck of a leverage bar. The force relayed onto the disk when that happens will be quite a bit.
Be careful! 
I have already posted this on another topic, but I have pictures of a wooden rack that was at the Richmond kickoff here: http://kyle.fnsnet.net/07FRC_rack.php