He's not talking about an auto-set, he's talking about a little marker that shows you where your traps were.
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Ah I better understand. Ok, I am for this idea. I have noticed already thought that when I go rebut a trap, the first one appears where it should, I.e. Where I placed that trap before on my base. Maybe just a furthering of this existing mechanic then is needed.
I am for this idea.