All changes to tower
| Date | Change | Source |
|---|---|---|
| 5 Jul 2011 | 1-8: turning, frame id added; frame info added | Andrew Higson via 00009477 |
| 12 Oct 2010 | 1,2: nominal added | Chris Pickford via 00008871 |
| 9 Oct 2010 | 3-7: nominal added; 8: nominal amended | George Dawson via e-mail |