I like lying in bed flying the Pitts S1C. I'm having a better experience since I got an Extreme 3D Pro with a twist stick for rudder control, but I got to thinking a couple of bluetooth accelerometers (like this - https://ozrobotics.com/shop/6-axis-bluetooth-accelerometer-motion-sensor-with-ble5-0-chip-for-acceleration-value-detection/) strapped to my feet might work.
These might even work on a diy pedal rig. Any thoughts?