May be interesting or not for you guys, we have figured out another way to get the problem of getting enough observer for a trials competition solved also this method will reduce the preperations of any trials a lot.
The participants will be split up in groups each groups is riding together and one of the group is the observer for the other ones, when the first is trough the section he will be the observer for the second rider and so on. The group has one card so this makes handling and scoring later easier too.
Got great response for this system, if there occure a problem it will be discussed and solved in the group, ay sorry will be shared, any luck too this keep the community factor high, very recommanded.
You can put the group's together as you want there should at least be three, best is out of one class, mixed groups are also possible if there are at least two participants of one class. The group should not be bigger then 7 persons.