I'm new to this mechanical music interest, but I have been doing model
steam engines for several years.  I founded a group called the New
England Model Engineering Society that now has nearly 200 members and
lots of organized model engineering activity.  I just returned tonight
from a model engineering show in York, PA, attended by several thousand
model engine builders.

Last year I took my John Smith busker organ to the show, and this year
another fellow was there with a Castlewood organ, so indeed mechanical
music and steam seem to link in many folks.

I have a personal web site with some of my engine stuff; haven't put the
organ there yet.  See http://plsntcov.8m.com/

Ron Ginger