The discussion about xylophones is interesting.  I thought I'd add the
fact that some instruments, notably the Nelson-Wiggen, has a xylophone
pitched an octave lower than the standard one, and is very mellow and
longer-toned than the usual ones.  It is called a marimba xylophone, by
the way.

Those who want to build their own can do so with a variety of woods.  I
found a wood called "Panga Panga" that even sounded like it would make
good xylophone wood, and sure enough, it did.

 [ Does it sound like its name: "Pang-a Pang-a"?  :-)  -- Robbie ]

I haven't run into any single stroke wooden bar xylophones for
instruments that didn't also have the iterations cut into the roll, but I
won't say they didn't make them.  However, I think the person who makes a
single stroke wooden bar xylophone for an O roll instrument is going to
be disappointed.

By the way, I personally like the sound of a 4-X roll on a G machine
because of the unusual effects it has with the pipes.  It gives the pipes
a tremolo that is really neat, in my opinion.  The last G I did was a
Seeburg G that shipped with about 35 rolls, and I heard them all, first.
Some of them I especially liked were these:

  4X-359--- Three Star Special
  4X-371---4X'LLENCE
  4X-361---Merry Moods
  4X-408---Going Places

You may be able to buy these from Paul Gottschalk.  They were all recuts
from Play-Rite.

So if you think that 4X rolls aren't any good on a "G" forget it! They
can be phenomenal!

Craig Brougher