All changes to tower
| Date | Change | Source |
|---|---|---|
| 3 May 2020 | 6: turning added | Tim Jackson via e-mail |
| 23 Apr 2020 | 1-5: turning added | [James Hedgcock] via 00013708 |
| 24 Oct 2016 | PN info added | PDG website via JCB |
| 1-6: frameid added; frame info added | John Baldwin via database | |
| 11 May 2009 | 1-6: nominal added; 6: canon info added | Andrew Higson via 00007428 |