Hello everyone,
I am glad to say that with the help from one of the player who spent sometimes to find out all buttons, pedals and the steering wheel's axis number, I have managed to add the support for G923 even without the device myself. It turns out that the player is indeed correct - 99% of the buttons / keys are identical between G29 and G923!
Since both devices are about the same, I have combined the option for G923 under G29's option when selecting the steering wheel option:
That's the main changes for this update, thanks for reading.