This is my Turnigy 9X transmitter, witch I'm very glad for and this is the changes I've made to it.

• First mod was the mod for flashing the firmware to ER9x opensource firmware. It opens a lot of posibilities and is easy to do.
  
• Got the Trustfire 2500 mA batteries instead of the 8 x AA batteries. Runs for hours now
  
• Back light for the the display. A must have. I choose the white one witch gives the clearest display.
  
• Made a extra modification to the back light to make it programmable via ER9x firmware.
  
• Trainer resistor fix. Made a solution to allow connecting of a additional transmitter or simulator via the jack plug on the rear side.
  
• Switched the transmitter to FrSky to get a better receiver with diversity and failsafe (FS).
  
• Switched the FrSky 2 dBi antenna to a 4.5 dBi antenna for a little better range.
  
• Turned the carrying handle the other way for better storage as it was taking to much room.

Upcoming project

Link - ER9x firmware for Turnigy 9X at Google Code
Link - Turnigy 9x Forum