All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Mar 2020 | 1-5: nominal added; 6: nominal amended | Tim Jackson via e-mail |
| Tuning description is only approximate | TimJ (#269 info D Kelly) via e-mail | |
| 24 Jan 2012 | 6: nominal added; 1-6: frameid added; frame info added | John Baldwin via database |