I believe that if the switches are anti-derailing switches, you don't need to do that.
If your engine is travelling cc around the outside loop and gets to the first A switch and it is set for divergent to the inside loop, then the second switch A will automatically allow the engine onto the inner loop. Same with the B switches - if the engine is travelling cc around the inside loop and gets to the first B switch and it is set for divergent to the outside loop, then the second switch B will automatically allow the engine onto the outer loop.
