That band is super loose. I set up the sprags side-by-side. They are identical except for the fact one is drilled and tapped of course. Maybe I'm missing something. All I know is that even with 1/8" gap between the pump and case there was no end play and I greased the surface of the end of the reaction shaft and I know it's not bottoming out in the drum. The pump bottoms out in the case effortlessly.