Dream-flight AHI servo tray for TGY-D56MG 5.6g digital MG HV cheap servo

This servo tray allows you to mount cheap, 1.2KG powerful and precise TGY-D56MG servos in the Dream-flight AHI to save weight and use 2 lipo direct supply.
Extreme Caution: Turnigy says those servos are 7.4v capable but I found max voltage you can feed it is 8.0V, if you feed with more of that voltage you will burn it...
the simple solution I found to direct supply with 2 lipo is to put a cheap 1n4001 or similar diode in series of battery, this make the voltage drop 0.5 to 0.7V and all work pe