flashforge Adventure 3C Troubleshooting repair, Bad PTFE tube Boden coupler, under extrusion

Pretty cool little printer. This printer had a bad PTFE tube Boden coupler. The customer complained about under extrusion. In a Boden setup the PTFE tube has to be locked in place for it to extrude. The coupler was compelely wore out and prevented the PTFE tube from securely attaching.
https://amzn.to/3v6zHxc

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