All changes to tower
| Date | Change | Source |
|---|---|---|
| 4 Jul 2020 | fr1: truss,layout added | Chris Pickford via e-mail |
| 27 Jul 2018 | all: turning,frameid added; 1,2: wt amended; frame info added | Chris Pickford via 00012996 |
| 24 Jun 2014 | 6: date amended (to approx) | Philip Denton via e-mail |
| 7 Mar 2007 | Tenor nominal added (B+2c) | Andrew Higson via pNBR |