All changes to tower
| Date | Change | Source |
|---|---|---|
| 23 Jun 2017 | fr1: truss,layout added; fr2: truss added | John Baldwin via database |
| 7 Jun 2012 | 1-6: frameid added; frame info added | John Baldwin via database |
| 13 Mar 2011 | Note added about 5th being heavier than tenor | Tim Jackson#172 (pNBR data) via e-mail |
| 21 Mar 2010 | PN now not Tue but Thu | L&M 2009 Report via JCB |