Getting back to the real magnitude of gyro precession. A great reference is the ITVV DVD "Hurricane R4118 the extraordinary story of a Battle of Britain survivor" .. a restored MKI.http://www.itvv.com/product/R4118
At the end of the DVD is 10minute segment of a solo display. Throughout the display there is both inset and full screen cockpit views. Most of the instrument panel is clearly visible. As can be seen that throughout and after the display the AH is still quite usable. This confirms the AH precession we are seeing in COD is grossly excessive.
Sadly the DG has been caged throughout the display.
Also noteworthy in the DVD is the bounce or jiggle in the ASI. At worst its about +-5MPH. On a side line there are no Merlin coughs or stutters ... though I guess it might have a later model carby setup.
Edit: just discovered that this airframe is fitted with SU AVT32 carby which I believe is the original type with no anti g devices/restrictors fitted.