[Lupusman]

I'm really surprised no one picked up on this before. (I did a search and found no previous discussion. Should have done it before I asked the question.) Anyway, I guess if it did work, it would be a bit annoying to the attacker, to the point of being unfair even.
Imagine, a super base with talisman, engine burners, and repulsers that worked properly. That's one hell of a locked door!
One way to produce the desired result would be to build a bunch of bases with only one repulser beam each, and minimal components to keep the cost down. Bit of a waste though.