Inspired by another version that I found on Thingiverse several years ago. I can not find it or the author. This is my take of the original design idea.
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**Previous designer is tc_fea his thing is More Pine Trees http://www.thingiverse.com/thing:7096 This is the version that I was referring to above.**
Designed as 50mm height. I would not scale lower than 1 and only go larger such as 1.5x, 2x or larger. Picture shows 1:1 1.5x and 2x