Dear Jim,  Greetings from The Bronx, New York, U.S.A.  Regarding the
elevation crank, mine was made from a metal rod bent into a crank shape
and then its end was ground to the proper dimension to fit the crank
holes (this is what came with mine).

As for the chuck adapter, there is only one.  It fits over the drive
chuck on the right side of the spoolbox.  There should be a rounded
clip at the centre of the upper portion of the spoolbox, this is the
retainer for the chuck adapter.

Mine is also a 58/65-note push-up piano player, called an "Aeriola",
which was also manufactured by Aeolian.  On my push-up player the
switching from 58- to 65-note playing is accomplished by the movement
of the left hand spindle of the upper portion of the spoolbox.  After
you've placed the adapter on the right spool chuck, the music roll is
inserted into and pressed against the left spindle (spring-loaded), the
right side of the music roll is inserted into the affixed roll chuck
adapter.

Inside the cabinet, behind the left spindle, is a sliding block of
wood.  This operates the cut-out for the 58-note rolls.  The narrower
58-note rolls activate the cut-out, shutting off the additional seven
notes of the 65-note scale (preventing the unneeded notes from playing
and/or wasting vacuum power).

Unfortunately I am unable to give you any measurements at this time,
as the instrument is in storage.  But when I had it set up and playing
it was a delight to operate.  The 58-note Aeolian Grand rolls sound
great on it.

Hope this has helped,
Sincerely,
Dale F. Rowe
Bronx, New York, U.S.A.