Fiido D11 - Seatpost joint repair - Out of Warranty

Fiido D11/D21/D12 seatpost joint fix after warranty. Nothing more, nothing less. STL 3D file: https://www.thingiverse.com/thing:592... Original message I found from Fiido: == Dear Fiido users, Recently, a few users reported that the D11 seatpost joint disconnected which aroused our great concern. We investigated the operation records and found this failure was caused by improper operation during the production process. The record of improper behavior existed in the production of the first batch of 185 units. At present, this batch has been sent to users together with other batches of FIIDO D11. When you pick your Fiido D11 up, please check if the joint of the seat tube and the saddle is good . If there is any looseness, please contact with the agent in time and provide the agent with: the order number,the frame number (which is around the bicycle head tube ), relative pictures or videos, we will replace you with a new seatpost kit as soon as possible. FIIDO is sincerely sorry for users. ==