Fix Herman Miller Aeron

I recently fixed my Herman Miller Aeron seat, and would like to document the process. The issue was the seat threaded insert was loose:

The loose insert
The loose insert

and from another angel:

The seat without insert
The seat without insert

The most affordable approach is:

I was concerned that the insert socket was compromised, so this fix would not last long.

Luckily, the seat was still under the warranty issued by the vendor,National Office Interiors & Liquidators. They offered a free seat replacement with installation kit, all I need is to pay for the shipping. To remove the c-clip, I followed the reddit instruction and bought the IRWIN snap ring pile, and it worked as a charm! Here is the dissembled hip pivot screw:

Hip pivot screw dissembled
Hip pivot screw dissembled

Once the seat was delivered, I just follow the instruction to install the new seat. Hopefully this would last longer, and thanks for the help from customer support of National Office Interiors & Liquidators!