All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Feb 2023 | Frame Fr2: material, truss, layout added; 1: weight, diameter added; 1-6: canons, turning added | Ian Chapple, local contact |
| 15 Oct 2016 | 1-6: frameid added; frame info added; 1: date,founder added | John Baldwin via database |