Several years ago I put a lot of effort into making a reader for
Maas Rowe Mylar carillon rolls because I had some that came with
the carillon I bought.  I used the original spoolbox, etc., and
connected it to a bunch of relays and interfaced this with the guts
of a MIDI keyboard.

It all works but if someone really wants to use it a lot I would
recommend replacing the keyboard guts with a modern MIDI encoder.
If I were to do this I would make my own with an Arduino.

I do not need the thing and will sell it at a very low price just to
compensate for a small fraction of the time taken to make it work.

Spencer Chase
Garberville, California
http://spencerserolls.com/