If you can not find just what you are looking for I have a digram for
a for a "EX Combination Foot-Powered and Electric Reproducing Action
and WX Straight Electric Reproducing Action for Upright Pianos" and
one for "SX Reproducing Grand Action" from "Standard Player Magazine".
It is a Vestal Press reprint. I am not sure if it is for a Recordo. It
appears to be from Player Piano Co. item B-48. They do not list a B-48
in their present catalogue. I also have the Simplex Recordo reprints
that Player Piano does show in their catalogue. If you order these from
them they might give you enough help to get the job done.