Does the Engstrom have a collective mounted throttle or a separate lever type control for the throttle?
Perhaps reducing the Rotor Rpm to the bottom of the green before commencing the final approach would have helped out in maintaining control....that was pretty much the standard method that I learned over the years.....anything that slows the tail rotor and thus reducing the thrust output to less than that required for a normal hover.
I always heard in tail rotor failures....stuck left (American rotation) makes for a good day....stuck right complicates things.
The BK manual suggests doing a run-on landing for stuck right....try that at 80 knots some night! Me...I would opt for a full autorotative landing with the engines in idle in stead of the run on method.