Thanks for the explanation!
I had already a spawn of class implemented:
That’s in the widget → list of all possible actors to spawn
My actors blok-1 BP is as follow now:
The above part works well, it’s just the below part (for attaching on the already spawned actor to eachother) I didn’t get working.
I don’t know how to set up the attach node?
It gave me the error that I couldn’t attach the blok-1 BP to itself…