All changes to tower
| Date | Change | Source |
|---|---|---|
| 28 Oct 2019 | frame: material amended | Tim Jackson via e-mail |
| 17 Apr 2017 | frame: truss amended | Nick Churchman via e-mail |
| 16 Apr 2017 | frame: truss,layout added | Nick Churchman via e-mail |
| 27 Oct 2016 | 1-6: frameid added; frame info added | John Baldwin via database |
| 20 Oct 2010 | 2: diam amended | George Dawson via e-mail |