dirtybird, one more post and I may abandon this subject forever! You can do all the tests you want but real world experience and observation is really the only thing that matters here. Simple fact, there are just too many documented examples of ignition related interference, even with 2.4 radios to ignore that it can happen. The most common being caused by leaving a Rcexl or DA type cap slightly loose where it doesn't make a good ground / shield connection. It happens and that's all I have to say about that.