RDS – System B axial System B axial is available for: Futaba S3150, S3155, S3172SV, S3174SVI, S3173SVI MKS DS6125 mini, DS6125 Glider, KST 125, 135 Graupner/JR DS3288, DS171, DS179, DS189, DS378 Turnigy S712G