Bionic adapter for robot hand

I have a friend who born without left hand and i promised, i'll plan and creat him a bionic hand because he can't pay the brutal prices of bionic things.
With this adpter you can use the InMoov robot hand as prosthetic.

I planed and made an AVR based electronic for this ,that controll the servo motors(what move the fingers) and process the muscle EMG signals. I need a little refinement on the software and when it's done I'll make it public that and the electronic's schematic aswell.

non print components:

-3pcs 18650 battery
-li-ion charger protector
-Dc-Dc converter
-3pcs servo like mg995
-2pcs microservo like mg90
-PCD8544 LCD
-Buttons
-EMG sensor
-Mainboard