Attachment 235206
Not the the aluminum coupler but the the dark little nut to the left of it on the ballscrew shaft.
If so how tight is it supposed to be? It was loose and causing all sorts of issues I'll detail in a video tomorrow but I tightened it a little, as much as I could without the the right tool, and it really fixed the backlash issue I started having. I'm wondering if I should get back under there and crank it down, I just don't want to damage anything.