It is my first no-tutorial UE project, so one big mess. So after like an hour of trying to play with your solution, which would be perfect if I were able to inherit the children in the filter… which for mysterious reasons I was not able to do… (i was changing collision settings in the children frequently from start of project)…
… I discovered another solution, after which I consider myself to be a clever person… 
On the end of the overlap:
Just turn the overlapping on and off… the most universal solution to this computer stuff…
It works fine for the specific situation.
Your solution taught me new stuff which I do not use now, but thanks anyway. I love how every challenge expands knowledge.