At the Philly regional, I saw very few people using the tether in the pits. But, by the nature of the different frequencies used, no two robots should ever interfere with one another, especially a competition-tethered bot and a non-tethered pit bot. You ever hear an announcement about no RF communication? You ever notice how the jugdes commyunicate? None of the problems anyone mentioned about RF interference would logically ever happen, unless you were within 5 miles of a major military base. Your problems are all most likely reception and heat related.