You can NOT use servo reversing to change the direction of an eCCPM function!

120 eCCPM uses 3 servos working together to achieve the desired movement. Servo reversing in the TX simply reverses 1 channel, with no regard to CCPM interaction.

The bottom line is that the programming in the e-flite TX is different from the e-sky TX. There is likely no way you will be able to make it work.

If I were you, I would check classified adds to find a decent computer radio that will work with your heli. Since 2.4ghz is growing in popularity, it is relatively easy to find good deals on used 72mhz transmitters right now. Just about any 6+ channel futaba or Hitec transmitter will work with an e-sky RX (negative shift)

Good luck!