That is our plan, finding a sweet spot for the shooter to go through the bars has been interesting.
The disks do not fly flat. If you add power the Disk will lift initially and then come down on a slow arch. less power = less initial lift and a steeper arch of decent.
Don't have any vids of the disk skipping around inside the pyramid but it was a fairly epic fail to have the frisbee bounce off of all for uprights and two different horizontal bars.
http://www.youtube.com/watch?v=lvmIwxxDBjg
http://www.youtube.com/watch?v=MK8kfpHBGhU