All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Oct 2018 | 1-4: nominal added | Chris Pickford via 00013109 |
| 24 Jul 2018 | 1-4: turning added; frame: material amended,(app)date added | Chris Pickford via 00012984 |
| 7 Feb 2018 | 1-4: frameid added; frame info added | Mike Chester via 00012750 |