Hi all.  Some years back I built a somewhat custom Wurlitzer 104.  It
had the standard roll case and valve chest and vacuum system.  I have
built four band organs over the years and this one was in need of some
restoration.  I thought I would convert it to play MIDI files.  I found
j-Omega Electronics in UK which sells a MIDI decoder.  I built a new
windchest that uses the electromagnet values and it all works.  See
http://www.j-omega.co.uk/ 

I started building band organs in 1971.  I was lucky to learn from Ray
Thomas, son-in-law to Herbert Vincent.  It's been a great hobby and
I have met wonderful people over the years.  If you're interested,
Peter at j-Omega is very helpful and sells a great product.

Les Higger

P.S.:  I have a roll case and several rolls that I would like to sell.