Two weeks ago, I modelled and ordered the diamond shaped smoke stack for my Shay. After some delay due to the eruption of an Icelandic volcano, it finally arrived today.
I must say that I am very pleased about the result and the picture below does not really do it justice.

The material at the top of the of the smoke stack is quite thin (about 0.25 mm) and due to the fact that the 3D-printing material is translucent, the quality of the part is not fully visible in the picture … probably best to spray it with some Tamiya primer on of these days and to shoot another picture.
I however believe that I have found a great method to model an HOn30 “Class A” Shay and will proceed to model more parts for this model the coming months!