Sunlu FilaDryer S2 Spacer

I found a couple of spacers for the Sunlu FilaDryer S2, but they were all too loose and/or too big. Since the spacer opens the whole top of the box, it doesn't need to open it up too much. I tried a couple of spacers, and most of them were too loose and fell into the dryer when I changed the spool. So I made this simple spacer that opens the top only a little bit and sits tight on the bottom part so that it will not fall into the dryer when you open it.