Hi Amnart,
Thank you for patiently waiting for our response.
Regarding your claim for order 20011087788, one of our Product Specialist has confirmed that the tail retract servo is missing. In line with this, we would like to offer you a compensation of $20 to be credited on your HobbyKing account as bonus points or credited back to your PayPal account.
Please let us know if you are amenable of this.
Thank you for your understanding. Have a good day, Sir.