All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Aug 2023 | Frame Fr1: truss, layout added | Neal Dodge |
| 24 Nov 2018 | PN info removed: practising discontinued | Izabelle Bimson via e-mail |
| 14 Oct 2016 | 1-6: frameid added; frame info added | David Sloman via e-mail |
| 21 Jun 2009 | PN info added | HDG 2008 Report via JCB |
| 24 Mar 2007 | Tenor nominal added (G#+7c) | GAD NBR spreadsheet via pNBR |