Hi John,  I don't have a Paine and Hopkins organ but the tuning should
be really simple.  Of course, everything is simple after you know the
answer!

Are you coming to the COAA Rally next week? [ http://www.coaa.us/ ]
If so, we could have a look at it there.  Jeff Vincent has the magic
touch with these organs.  He lives here in Rochester but he's not
coming to the rally.

Send me a few pictures of the organ and I'll see what we can do.  If
one of the ranks is closed metal pipes, that would make it easier but
I'm sure we can figure it out anyway.

Regards
Craig Smith
Rochester, New York, area