Brian.....
Over the years I have been flying the 212 and particularly the 412 I also have noticed that those tailbooms have required alot of re-work.
I wonder if in fact the tailboom strakes will allow for more "smoother" yaw control and effectively reduce the stress on those booms by eliminating the airflow breakaways and thus the sudden excursions which must put much extra stress on the boom as we correct them????
Mmmm
