All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Dec 2013 | 1-3: nominal added | Tim Jackson via 00010584 |
| 15 May 2013 | fr: truss added | Chris Pickford via e-mail |
| 3 May 2013 | NOT u/r | M Regan article p456 (based on CJP info) via RW |
| 1,2: (app) wt added; 1-3: canon info, turning, frame id added; | John Baldwin via database | |
| frame info added | John Baldwin via database | |
| 14 Mar 2005 | TowerBase ID added | Tim Jackson#77 via e-mail |