Adding and removing actors from an Array?

Ok… I see what it’s doing, but I’m having issues.

Walking atop the boxes, as I need to happen, the “On Component Hit” doesn’t do anything. I tried it with “On Component Overlap” but its very laggy and only seems to affect every other box, not destroying around half of the objects.

I also can’t figure out what that “SET” node, or the “–” node are… I can’t find them.