RE: 4 aileron servos - need TX help
I don't know the JR radios so take this with a grain of salt... But generally computer radios have a built in mix to handle ailerons on two channels, no need to use a custom mix. In the case of my old Hitec Eclipse I think it was channel 1 and 6 that were hard coded.
I have the CG Pitts Monster but I use a Multiplex radio so each aileron gets it's own channel, no Y's. If I was using my Eclipse I would put the two right ailerons on a Y to channel 1 and the two left ones on a Y to channel 6. If you do it top wing/bottom wing you would not be able to do things like aileron differential via the radio programming.
My .02,
scott.