Thanks Chris, yes this my concern.
Rob, you make valid points as well. You, Chris, and other with permanent layouts have the knowledge.
I will be running 400e's, 384,390, 408E, and an Ives 3245 or 3254 pass set.
Therefore thinking about bumping up the outer O-gauge loop to o84 and std to 72.
Jan-will this work??
Joe Gozzo