Gridfinity Oral B IO brush holder

Here's a small 1x1 Gridfinity block that can hold up to 4x Oral B IO brushes. 
I also made a 2x version as 4 brushes can be a bit tight. On the 4x model the stands are placed so that there's a smaller gap against the wall, where the 'back side' of the brush should be oriented, allowing you to fit 4 brushes. 

 
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