Electric skateboard transmitter mod for Flysky FS-GT2

This is a new casing for a Flysky FS-GT2G 2.4GHz Transmitter. I made a transmitter for electric skateboard by taking actual components from a Flysky transmitter and placed it into a smaller casing.
Looks like any Flysky FS-GT2 transmitter will work (?).

What you need:
18650 one cell battery.
Female servo cable (charging port).
Flysky FS-GT2 Transmitter
Glue (2-component)
Soldering iron (soldering on to battery only)

I did cut some of the plastic in the knob panel to make it smaller.