| Digest Nr | Subject and Author |
 |
| 2008.08.21.07 | Parts for Retrofit Nickelodeon, from Duaine Hechler |
| 2008.08.20.07 | Parts for Retrofit Nickelodeon, from Larry Mayo |
| 2008.08.19.03 | Seek Parts for Retrofit Nickelodeon, from Duaine Hechler |
| 2004.03.23.04 | Seek Player Retrofit Recommendation, from Bella |
| 2004.02.23.11 | Retrofit Solenoid Actions for Old Player Pianos, from John Dewey |
| 2004.02.22.11 | Retrofit Solenoid Actions for Old Player Pianos, from Peter Phillips |
| 2003.08.17.03 | Odd Retrofit Piano Player System of Circa 1900, from Philip Jamison |
| 2001.10.16.07 | Metrostyle Pointer Retrofit ?, from Jim Canavan |
| 2000.09.26.10 | Retrofit Pneumatic Player Actions, from Joe Gumbosky |
| 1998.07.23.10 | Meaning of ' Retrofit', from John Farrell |
| 1996.12.14.04 | Retrofit Ampico Mechanism, from Bob Ebert |
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