Brush Insert for Shaving Stand

I printed out nanonick's Shaving Brush and Bowl Holder (https://www.thingiverse.com/thing:2000060) and found afterwards that the handle of my brush was just a little bit too small and would slip out too easily. Rather than scrap the print I made an insert that Clips unto the underside of the brush arm and narrows things just enough to hold my brush securely.