| Digest Nr | Subject and Author |
|---|
 |
| 2016.02.18.02 | Ampico A Intensity Valve Gap, from Darryl Zempel |
| 2006.06.05.07 | Gap Between Tunes For A-roll Selectra Codes, from Don Teach |
| 2006.06.05.06 | Gap Between Tunes For A-roll Selectra Codes, from Bob Stewart |
| 2006.06.04.03 | Gap Between Tunes For A-roll Selectra Codes, from Bob Stewart |
| 1999.06.30.04 | Mechanical Musical Memories in Gap, Pennsylvania, from Jim Canavan |
| 1999.06.29.03 | Mechanical Musical Memories in Gap, Pennsylvania, from Charles Davis |
| 1997.12.10.15 | Duo-Art Valve Gap Setting, from Phil Dayson |
| 1997.03.07.14 | Valve Gap Theory, from Douglas K. Rhodes |
| 1997.03.06.08 | Valve Gap Theory, from Karl Petersen |
| 1997.03.05.19 | Valve Gap Theory, from Richard Vance |
|
