All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 Jun 2017 | frame: truss added | David Sloman via e-mail |
| 4 Dec 2016 | 1: wt amended | Tim Jackson via 00011890 |
| 8 Oct 2012 | 1-3; frameid added; 2: turning added; frame info added | Keith Gatman via e-mail |
| 26 May 2009 | 1-3:canon added; 1:wt corr'd; 2:wt added; 3:diam added, yr corr'd | Andrew Higson via 00007482 |
| 30 Oct 2004 | Tenor note added (nominal = Bf+9c) | David Kelly via e-mail |