You know i thought most people with castle system glitch problem came from a combo of savox servo and some brand of rx ( leaving the name out so i dont get flamed) . I have never had a problem with my savox and mine all high voltage and that even in my nitro with a hump pack. I told a couple of guy at the track last year that some off name brand stuff just dont work nice with some. i put my futaba stuff in his car ran it for it day no problem then he got one the next week i think. so some rx are not very good as they say. but yes castle does have a bec issue on some off the models but i think that was there smaller stuff. never ran them cause there un-sensor