algerdes
Al Gerdes
One thing to consider is how many you have coming to see your display. In our case, we started out with a 35 min "show", but due to popularity (or something we just can't figure out) our numbers grew. Our wait-time/backup to get up to the display was getting very long - so the show was cut back. Now we are at 12 minutes so we can get the folks to move on and let the next group in.