I did my first 3 flights on the instructor end of the buddy box today. I only had to recover the plane 1 time in each flight. The last flight I
had to recover from inverted as my student banked too steep. I am wondering if some of the other instructors can give me a general
idea of when to the take the control from the student? I had to recover one time 40-50 feet up and falling knife edge, am I letting the student
get too far gone, or is there a rule that says to let the student try to recover until the instructor is no longer comfortable.

Thanks in advance
Chris.