Crabbo,
The NASA designed tail boom strake on UH-1 and now 212 series is almost identical to that in the Wastelands SK4.
Never flew the SK4 before the strake (assuming it wasnt a design fit?) but have flown the Huey before and after. The effect is significant esp at high DA....ie: tropics/mountains.
Also important is that in auto-rotation (with relative wind from 10-11 o'clock) there is an increased chance of encountering full right pedal.
I know this is obvious, just info for interested parties.
"Fear God Honour the King"