I've managed to make a neutral bunker, as in, a bunker anyone can use (only 1 at a time though). For this I used the "Shop Sharing" system from Bifuu's hero tutorial and a Neural Parasite type Behavior (so you "capture" the Bunker by entering) which is applied to the bunker through the transport ability. My problem is that when I exit the bunker, both it and my unit switch over to the neutral player. I have tried various "apply Behavior upon unloading" variants, but either I missed the "Player" reference to the unit owner or it just doesn't work. I guess transports inflict a permanent mind control upon their cargo, which can't be traced back to the previous owner? Does anyone have a trigger-free solution to this?