Hi,

I just bought the Gy 401 from Aero Hobbies in Lewisville. Great place for heli guys in our area. Anyway, Andy told me to adjust the delay setting down to half and be sure that the digital mix is turned off, to use with a standard JR 537 servo. It may be that the S3004 is not fast enough to accept the signals from the gryo. It is do doubt a faster digital servo would be the best.

Also sent a pm.