I had Advance Acrylic make me a custom sump that would support the Klir and whom I also ordered from them, and began the dry fitting for installation to replace my existing sump inside my tank.
Based on the issues from some of the users on reef2reef

, I thought I should dry test mine and what I observed is that both of my units bind before even getting them wet. I emailed Support on the issue, and stated can supply video of the issues. Both of my new units bind to the point the fleece stops moving freely for a second and then suddenly releases (Jumps) letting go of the fleece roll.
With some troubleshooting I was able to determine the binding was coming from the bottom unit but was binding on the top portion of the unit.
If I remove the Optical sensor the binding almost stops, and if I remove both the optical sensor and the silicone guides the fleece rolls smoothly through the unit, no binding, pulling evenly and smoothly through the unit.
With the Optical Sensor removed I also observed the fleece roll is visible within the optical sensor opening.
I did some additional testing, and it seems if I raise the Fleece roll up the binding stops, but I am still running test to determine if this is 100% factual.
My 3d printer is now crafting a new inner roller for the Fleece Roll that is 1/32" smaller then the diameter of the fleece roll received(and the size of replacement rollers), I noticed the existing one they supply is loose within the fleece roll. I think this will set better inside the unit, raise it up and will make sure the fleece roll stays even on the roller, a theory but thought I would try
I did not expect to see binding right out of the box, but was wondering has anyone else had their unit bind out of the box.