Spool Saver (Wanhao Di3/Clones)

My spool of filament on my Maker Select (Wanhao clone) likes to come unwound sometimes as the nozzle moves back and forth (it's mounted to my control box). This, I fear, will subsequently lead to the filament tangling and jamming, ruining a print if I'm not there to watch it. So I opened Fusion and created this in a few minutes. Should print fine in any material, and slots into the square hole on the side of the filament mount. The arm goes over the top of the spool so the filament can't fall of