All changes to tower
| Date | Change | Source |
|---|---|---|
| 19 Nov 2022 | 3: weight amended | Whitechapel records via David Sloman |
| 1 Jul 2022 | 2: weight amended | Whitechapel records via David Sloman |
| 16 Feb 2019 | 1,2: diam added | David Sloman via 00013299 |
| 7 Oct 2017 | 3-8: frameid added; frame info added | David Sloman via e-mail |
| 20 Dec 2012 | 1-8: turning info added; 3-7: diam, canon info added | Chris Pickford via 00010190 |
| 18 Aug 2004 | PN is NOT Friday | Richard Hutchings (after visit) via e-mail |