I agree. Glitch problems are often external from the Rx. A battery pack that is unable to deliver peak currents (high torque servos can be demanding), antenna routings that are impacted by nearby servos or wiring, metal-to-metal isues, long servo wiring, etc, are just a few of the gotcha's that will create glitchy situations. Usually a PCM Rx will just mask these so that you cannot see the real problem.