Well NWO was closed because people were sick on it and the ride had to be cleaned about 6 times.
Rush is still having maintenance work being done.
Nemesis Inferno had a problem with ice making the track rusty so had to be sorted before it could be fully run.
would you rather go on a ride when it is safe to do so rather than know the job was done slack and not to standard.
Also nemesis is not held togerther by tape! they are just markers