All changes to tower
| Date | Change | Source |
|---|---|---|
| 10 Jul 2022 | Simulator added | Sue Hall |
| 1 Dec 2016 | frame: layout added | Mike Chester via e-mail |
| 1 Jul 2011 | 1-5: nominal added; 6: nominal amended | Andrew Higson via 00009466 |
| 6 Mar 2010 | 1-6: turning, frameid added; frame info added | Mike Chester via 00008523 |
| 30 Dec 2007 | Tenor note not G; nominal: Ab-43c | Gordon Birks (Taylor Rings spreadsheet) via e-mail |