First, my thanks to Jan Kijlstra and Wiel Geraats for their responses
to my inquiry about Piet Paardekam and his website.  At the time that
I inquired, my Google search got "404s" -- website not found or not
responding.  Internet reliability is not quite perfect.

As was mentioned, Piet Paardekam has been running a forum on topics
related to mechanical organs.  The forum is conducted mostly in Dutch,
with a few items in English.  It is still worth the occasional visit by
Americans and other "English only" enthusiasts.  There are frequently
informative pictures.  You can also run a page which looks important
through Google Translate for further details.

Wallace Venable