All changes to tower
| Date | Change | Source |
|---|---|---|
| 2 Nov 2012 | 1-6: founder amended | Peter Dyson via e-mail |
| 26 Sep 2011 | 1-6: turning, frame id added; frame info added | Andrew Higson via 00009703 |
| 20 Nov 2006 | Tenor not note G; nominal added (Ab-26c) | GAD spreadsheet via pNBR |