My Qidi Box FINALLY came. It only took a month. The upgraded extruder it came with, the tension bar was already bowing so it got one of my aluminum bars. Now it's ready to go.
I discovered the tension bar in my Plus 3's extruder was starting to warp. So I machined a replacement from aluminum. It'll no longer be a problem. Added bonus they also fit my Plus 4 so it's been upgraded as well!