Here is my biggest problem with a choke servo...Im gonna put 2 of these in a VQ P-61 and i want to keep as much of the cowl intacted...Im already gonna be 13 servos deep with this aircraft adding 2 more even micro ones grr its just grief is all...What i dont want to happen is have one the the chokes close on me in flight big time nightmare. Thats why im partial to the open/closed no servo no spring needed method of the BME DA's etc...