My personal custom shell for FlySky remote model FS-i6 where i replaced the AA battery compartment with a 2s 650mah lipo slot. i also soldered a connector to easily connect the student-pilot cable.

All the electronic parts are from the original FS-i6 except for the lipo (and relative cable with plug).

I printed in PLA, then sanded, smoothed with a plastic primer and finally spray painted for better. Finally I applied some carbon-like vinyl on the sides and front shell.

On the first build plate the front shell is placed face down for less printing time and support material, but I recommend printing the fourth plate where the shell is facing up: it uses more material but the result is better.