RE: Used Tx buying tips and 9c as entry to 2.4GHz
The 9C Super is a much better choice for an electric motor sailplane if you are wanting the ability to run CROW. The throttle cannot be moved off the left stick and the CROW is variable off of the left stick with the plain old 9C which is what I have. [:@]
Now with the 9C Super, Futaba allows either function to be moved to another switch/ slider of your choice. If you don't have an electric motor on your sailplane this is not quite a concern. Or if you only are planning on running a motorized sailplane without ailerons/flaps, this is not a concern.