All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Dec 2017 | 2,3,4: diam amended | Tim Jackson via 00012682 |
| 15 May 2014 | fr2: date amended | Tim Jackson via e-mail |
| 24 Jul 2009 | 1-6: nom'l, canon, turning; frameid added; 1: f'der corrected; | Andrew Higson via 00007862 |
| frame info added | Andrew Higson via 00007862 |