Looking at the LED indicator I believe Bob used, I would have been tempted to use two of the single direction arrow variants if I was taking that route. This would save the need for isolating diodes whilst showing which direction was selected.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone