Thanks. I know from personal experience in the Scooter (A-4 Skyhawk) and the Whale (EKA-3B Skywarrior) that leading edge slats without positive control; i.e., hydraulically actuated, are problematic. I believe I've solved how to have symetrical leading edge slats that extend properly along the full length of the wing, but it'll take a bit of time to fabricate and bench test them.