Lloyd Osmundson asked if there is a difference in instruments between
the Nelson-Wiggen 4X and the 5X (010203 MMDigest).

The 4X has a 28-note xylophone;  the 5X has a 20-note marimba (with
tubular resonators) that are pitched exactly with the piano notes they
are teed into.

Both have expression capabilities that can out do a Seeburg KT any day
of the week.  I believe both have snare drums and triangles exactly the
same size, and of course both have the famous "banjo" mandolin rail.

Stephen Goodman