All changes to tower
| Date | Change | Source |
|---|---|---|
| 8 Oct 2011 | 3: turning added | John Arthur via 00009712 |
| 21 Aug 2010 | Frame: truss added; layout amended | John Arthur via e-mail |
| 10 Aug 2010 | 1-3: turning, frame id added; frame info added | Alan Birney via 00008767 |
| 26 Nov 2006 | Tenor nominal added (C-12c) | David Kelly via pNBR |