Hey again!
I tried to use the proximity sensors now, but I think it is not the solution I am looking for. (Although I love the sensors and using it for some other things now

)
Maybe my description of what I am trying to do was inaccurate.
What I want to implement is a scene for an experiment where the cylinders are already initialized. If I understand correctly the sonsors are checking if a target enters/exits, but thats not happening when initializing. The new cylinder is "just there" at a moment.
Is there still a way to get it working with the sensors?