All changes to tower
| Date | Change | Source |
|---|---|---|
| 11 Jan 2022 | 1-3: nominal added | Recordings provided by Kye Leaver (taken by Andrew Leaver) and analysed by Nick Bowden |
| 31 Jul 2017 | 1-3: frameid added; frame info added | David Sloman via e-mail |
| 28 Apr 2004 | Tenor note, and tuning info supplied | Tim Jackson#62 (from visit) via e-mail |