I'm going to throw this question in here and see if someone has an idea. I remember on a full size Cessna a pivoting metal 'flap' device that activated the stall warning buzzer. This was on the LE. I don't know what other types may be out there. To replicate this on a model, I'm wondering how to create this. I'd like to do this on a model with tv tx and an audio channel. What puzzles me is the relation of the airflow to the flap at high AOA. Any thoughts?