d/w t/o perf
As I`ve only flown Jetboxes recently,and a 212 about 30 years ago(once),otherwise vastly experienced,my suggestion would be to note Tq and pedal position facing into wind ,then 180 and note again.You may/will find that you are using less power as the t/r is in free air and has enhanced perf.,therefore less pwr.rqd., and the downwash does not "wet" so much of the fuselage,gaining a bit more performance.I don`t` know the" strakes" that have been mentioned,but if they are lengthwise along the top of the tail-boom,then we put them on S/king`s` in 1982 to improve yaw control in sideways flight/x-wind hovering and give a more linear pedal postion,and reduce control (pedal) reversals.They just "spoil" the airflow around the t/boom,particularly in right x-winds.