I just put this up here as back up on what I'm doing, the kismet above is all about opening a door once you have a key which you get once the animation for the slot machine is over. So its not that hard. Tore my hair out for hours trying to figure it out and to find one tick box that had to be checked. I love UDK soooooooo much. I cant be bothered to go through the sequence of nodes i pressed here but i will in my design doc :)
This small piece of kismet controls a thing disappearing in a scene, i took notes on this one as it is smaller;
-Put builder brush around object you want to disappear
- go to volumes and set trigger volume
-open up kismet with the volume selected and go to "NewEventUsingTriggerVolume_0" "Touch"
-Add Action > Toggle > Togglehidden, have the mesh you want to disappear selected when you do this
- Connect Touched to toggle
-Click add New Object Var Using Interactor and connect it to target
-Then what should happen is when you enter the trigger volume the mesh disappears
-Note that i have been reading about how collision meshes don't disappear so i have to be careful. Though when you convert a static mesh to a interactor it sets it to no collision so that's fine. For the door in the first kismet i need to set it to block all to not allow the player to walk through the door.