All changes to tower
| Date | Change | Source |
|---|---|---|
| 30 Jun 2020 | 1-6: turning added | Tim Jackson via e-mail |
| 22 Mar 2017 | fr: material,layout amended | Tim Jackson via e-mail |
| 10 Oct 2014 | fr: date amended | Philip Denton via e-mail |
| 21 Oct 2008 | Tenor note not G#; nominal G+35c | Andrew Higson via pNBR |