Gulli......ever use the Throttle to reduce Nr to the bottom of the green arc....or even a bit lower when dealing with a "Stuck Left" situation?
The problem you described is simply an excess of amount of Tail Rotor Thrust.....slow down the Tail Rotor and you reduce the amount of thrust it is putting out.
You can do that in forward flight as well to reduce the amount of side slip angle and determine if you can control the aircraft at slower speeds.
Stuck Left Pedal situations are straight forward.....as compared to "stuck right/no tail rotor thrust or thrust pushing the nose off center to the right (American Standard Rotor System).