Symptoms: Keyhole turn is larger than needed.
Cause: Calibration speed.
Resolution: If you calibrate at the top of the speed range the EDX will expect you to make the turn at that speed. When turning at a slower speed this results in a wide loop on the keyhole turn. Recalibrate the e-turn at the bottom of the speed bar, closer to your actual turning speed, and it will result in a smaller loop on the keyhole turn.