Replicator 2x cant get build plate to level

[EEEliminator]

Bar under what lid? I noticed my left nozzle drags too, when its set to dual extrude it melts a pattern of what he right extruder is doing. I was going to look into adjusting this soon, seems to be okay if I'm only using one extruder though.

[Mouser]

Bar under what lid? I noticed my left nozzle drags too, when its set to dual extrude it melts a pattern of what he right extruder is doing. I was going to look into adjusting this soon, seems to be okay if I'm only using one extruder though.

I experienced this same thing but I just have the single extruder Rep2 and not the 2X. When trying to level the plate, my nozzle would slam into the build plate every time. It would do this when the extruder would move to the center of the build plate.

my problem, and it sounds like it was the authors problem too, ended up being one of the rods that carries the extruder had popped out of one of its mountings allowing the extruder to droop down. It's the steel rods that are hidden underneath the top sides of the printer. They allow the extruder to move back and forth along the Y axis. These rods "snap" in place. One of mine had fallen out somehow and I snapped it back in and everything is fine.

this sounds exactly what the author of the post describes what he did to fix his problem.