In 011129 MMD, John Page wrote:

> The spacing of the keys is the usual 3.5 mm (or more precisely,
> 3.49 mm) with 10.5 mm from the leading edge to the centre of the
> first key.  The width of the music card is 264 mm.

Very good.  I think I know what he means by "leading edge."  It's the
one that rides against the brass guide at the back of the keyframe
(toward the front of the organ.)  Right?  Now if I knew what each of
the 72 keys does, then I'd be all set.

Regards,
Doug Mauldin