Good suggestions.  Space limitations made it so we had to shorten the amount of space the rail could take up, hence the snugged-up set-up, but we will be able to change that for the next one.  Also, the box was definately short, the longer one we were supposed to get had been run over by a groomer (DOH!) and was out of commission.  We are building new features for future sessions. What do you all think about rainbows and c-rails?  Bomb drops are a little hard given safety concerns, but if you have suggestions for how to make it reasonably safe, we'd love to hear them.  We are going to go for more ramps to features off of the scaffolding (maybe one off of each of 3 sides), and maybe a two-story scaffold, though that might get tricky...