All changes to tower
| Date | Change | Source |
|---|---|---|
| 16 Nov 2009 | 1-4: turning, frame id added; 1-3: wt, diam added; | Roy Williams via 00008279 |
| 2,4 canon info added; 3: cracked (& lump missing from soundbow) | Roy Williams via 00008279 | |
| Frame info added | John Baldwin via database |