CARduino controller: Arduino based rc car radio transmitter

Hi everyone!
This is an arduino based RC car/boat controller. It's equipped with a steering wheel and a trigger for throttle control, both datas are acquired through common potentiometers.
The electronics are fixed on the back plate trough a PCB board (3x7 cm) and must be soldered like shown in the images.
The non-printed parts needed are:
-1x Arduino nano
-1x NRF24L01 (wifi module)
-2x potentiometers
-1x 3x7cm PCB board
-1x 18650 Battery
-2x Rubber bands
-1x velcro strap to hold the battery
-some wires to connect electronics
-5x M3 screws (to mount front plate on back plate)
-3x tiny screws to mount PCB on back plate.
I uploaded my Arduino codes (transmitter and receiver) with the stl files.