Hi all,
Thanks for the comments. I am located in central Illinois (Springfield).
The little vertical steam engine is made of bar stock. The frame is a soft soldered brass fabrication, the cylinder is a bit of bearing bronze, and the piston rod is a parallel portion of a sewing needle. The cylinder head and steam chest are attached with studs and nuts, 000-120. For plans I simply divided Stuart's 10 V drawing by four. The bore and stroke is 0.187". It runs nicely on air. Maybe someday I will add the reversing gear.
Chris