I hope this is an acceptable route for a guest to respond to a post in another section of the forum.
In the section devoted to semaphore signals recently "Waterloo" posted a query about Westinghouse ground signals. I have recently had a go at the problem and had etchings and lost wax (actually "lost styrene") posts made. I was able to display the prototype at the recent ExpoEM at Bracknell. I also have photos.
I hope Waterloo will be able to contact me if he is also a member of EMGS he will find my details in the Newsletter under NW Surrey Area Group (I hesitate to put an e-mail address on a public forum).
J Douglas Smith