If you are using a plane/copter with your DX6i, you normally
have zero throttle at stick down.
If you sometimes want to use a RC car or a 3D copter with reverse,
you might need to have zero throttle at middle stick.
You can permanently change that with some 3D printed parts and a
spring, but you will need to open the radio each time you want
to change the vehicle.
With this add on, you can use a rubber band to temporarily have
throttle zero at middle stick.
It should work with the normal screws but it might be a good idea
to get longer ones...
You can get the source files and updates on https://github.com/darktim/DX6i-center-throttle-3D-print
Feel free to fork and adjust ;)
I had to scale the whole thing to 99%
Please adjust the scale if its not fitting properly
You might get away without support, just try it out..