John, Your work is magnificent ! I would have no idea how to do what you have just sent me a picture of. Externally it's a true work of art. I visited Henning's Trains online store hoping to see that perhaps you marketed these for sale but no luck. This is a much neater approach then wiring up two 5906 sound activation buttons in tandem. Again, you should market these for sale because I would gladly be your very first customer for sure.