To the best of my memory some of the Aeolian Hardman Duos did not have
sustain pedals from the factory.  Aeolian appears to have been saving
money on production.  I think the ones that had sustain pedal pneumatics
in the bottom of the piano.  You could buy a pneumatic ready to go, so to
speak, at one time from Player Piano Co.  It would be easy to build or I
could send you an old one from an old upright.

Don Teach
Shreveport Music Co, 1610 E. Bert Kouns, Shreveport,  LA  71105
dat-smc@juno.com