All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Apr 2020 | 1-4: frameid added; fr1: details added | Tim Jackson via e-mail |
| 26 Feb 2012 | Tuning description slightly amended | TimJ#180 via e-mail |
| 15 Jun 2009 | 1-4: nominal added | Nick Bowden via 00007589 |
| 25 Nov 2003 | More precise (than 'minor') description of tuning | Tim Jackson #52 via e-mail |