ATL or EPA should not affect the trim of steering and throttle, however I have seen the in past where the brake side / reverse side EPA or ATL affected the throttle neutral on both gas and electric when the % is small, futaba has 0% - 100% or 125% range I believe. So if brake side ATL is say 15 - 20%, then your vehicle might go forward with original throttle neutral trim. But please do contact Futaba about this.