Thank you for the detailed photo of the component you found! @markevans36301, thank you for the diagnosis (and the fancy language!) I think you’re correct about the part. @zerflo, just to be on the safe side, would you mind checking each knob which held you laser arm in place during shipping and verify if one of the washers is missing? Then, please keep the washer with your other Glowforge packaging in case you ever need it for transport or shipping. I’ve attached a picture of the knob.
I’ve been looking for the shipping kit and I think I left it on the original box (which is in storage RN), so I’m not sure if it’s missing from there. but I believe everything points to the same answer.