I have been lurking in the depths of the "Digest" for some time now.
All the while building a crank organ to Roy Norman's plans, with some
notable differences.  One of these differences is that I am using 31
note rolls instead of book music.  I would like to know if there is
some rule relative to tracker bar hole size relative to paper hole
size.  Are these the same or is the tracker bar hole larger or smaller
than the paper roll hole?  If larger. or smaller, which, and by how
much.

Thanks.
Tom Griffith