To anyone who can assist, I have a hybridization problem:

I have received excellent advice from the members of the digest, and now
I have another puzzler.  My Pratt-Read upper action is mated to a
Gulbransen lower action.  (I purchase the piano like that.)  I have
successfully interfaced the two with a few supply tube adaptations,
and a custom foot pump bracket.  Here is the result:

   - When the wind motor governor is adjusted to yield a steady motor
   speed, the fastest that I can drive the motor is about tempo 70.
   Increasing the external spring tension increases the speed a little,
   but I need more than that.  I think the Gulbransen lower action
   output is insufficient for the Pratt-Read action.  I'd like to get
   tempo up to the 130 indicated on the scale, if possible (but even
   90-100 would be nice).  I would prefer NOT to make permanent
   modifications to the Gulbransen unit, as I may replace it some day
   and some other sole may have a use for it.

   ( I am looking for a Pratt-Read lower action.  I know this is
   the best solution.  Maybe someone knows where one is sitting idle.)

Thanks for any advice,

Larry Toto