Actually, the Rankine timeline would probably be a better comparison.

Because JJ Abrams uses the name Kelvin in a lot of his works. I think it was his grandfather or something. But in Star Trek specifically, it is the name of the ship around which the events that the divergent timeline started.

Make sure there isn’t too much tension on the cables to the hotend assembly. Could be pulling too tight and lifting a bit when it gets too the far side