How to replace RC Helicopter tail boom assembly feat. xk k110s || polarity issue

Tail boom replacement of my xk k110s due to crash as I tried it to fly aerobatics. Tail boom is not that expensive however it would take 10 days before you receive it as it is sourced from China.
Watch the full video until the end because there is a very important lesson you must learn and understand.
#howto
#helicopter
#tailboom
#rchelicopter