All changes to tower
| Date | Change | Source |
|---|---|---|
| 3 Jun 2019 | fr1: date amended | Chris Pickford via e-mail |
| 2 Jun 2019 | 1-5: canons,turning added; fr1: truss,layout added,mat'l amended | Robert Palmer via 00013439 |
| 31 May 2010 | 1-5: frameid added; frame info added | John Baldwin via database |