I realy liked my xoar the pull was way down low. It uses the torque of the dl-50 to pull the plane. Its awesome. I found an RCU forum about xoar. It said that JXF and xoar are sister companies. So I'm gonna order a JXF prop and a cowl from the place I ordered my plane from. Hopefully J-tec will take that pice of crap muffler back.