All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Jul 2017 | 1-8: turning,frameid added; 1-7: nominal added; frame info added; | Chris Pickford via 00012280 |
| 1,3,5,7,8: diam amended | Chris Pickford via 00012280 | |
| 7 Nov 2016 | PN info amended (was Thu) | J Sunter via e-mail |
| 1 May 2006 | Tenor nominal added (F+16c) | Andrew Higson via e-mail |