https://ogrforum.ogaugerr.com/...4#152477234138967534
Three way switch is not all that complicated. A left hand, and right hand switch, back to back. Two switch motors, one for the left switch, one for the right switch.
You have to logically place each switch back to through, before position the other switch to diverge. I tried to do some complicated non-derail with no success. Wire the switch as shown on the Ross diagram