I think with some care, we can create very thin window edges in die cast, while having the weight needed for pulling lots of cars in the yard. The 2 Rail models we made were full of weights, but the 3 Rail models will require all the space for the ERR circuit board and sound card and speaker.
I think this project may have some legs so I will add it to our website for reserving.
Thanks for all your input and concerns.
Scott Mann