One thing else is to closely check the pins on all your plugs and extentions. I had a jitter that came and went and I finally found a pushed pin on a plug going into the RX. In case a pushed pin is a new term, the housing has a tab that latches the conector and if this tab isn't properly seated, the conector can push back during insertion. The bad thing is that they will have some friction contact and may even pull the conector back in place when you unplug the cable. Check them plugged and look at the wiring end to make sure the contact where they are criimped to the wires are all even.

Don