All changes to tower
| Date | Change | Source |
|---|---|---|
| 15 May 2013 | 1: canon info added; frame: date, truss added | Mike Chester via 00010377 |
| 6 Mar 2010 | 1-6: turning, frame id added; 2-6 canons added; frame info added | Mike Chester via 00008511 |
| 10 Jun 2009 | PN is Mon (not Fri) | Anthony Cotton: DDA Annual Report via e-mail |