Llearning about portals for use with AI trains... I have four TRS19 portal's working (set next to each other), two spawning and two consuming. A 2 track AI main line so to speak. But does't it make more sense to use a 2 track tunnel/tunnel entrance and 2 Portal Basic tracks? Two TRS19 portals sitting next to each other isn't very prototypical. Is there any compelling reason to use the TRS19 portals in a "TRS19" route? Just want to make sure before I rip them out and re-do with a two track entrance.