I am noticing a lot of small cheap 2.4 tx's that come with all the ghetto rtf planes, and even some of the nicer brands as well. Do they have a coded signal like futaba, do they switch constantly like spekkys? Our club instructor says he doesn't trust them, but I haven't seen a thread or heard anything else about them. I got curious when I saw the little itty bitty foamies coming with them.