Dehydrator Spool Holder Bottom Remix

USE AT YOUR OWN RISK
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This started as a remix of 3dMakernoob's bottom piece of his [Dehydrator Dual Spool Holder](https://www.thingiverse.com/thing:3293081) to not require bridging (FilaGuideBot.stl).

After printing, I found that it sat fairly loose in [my Dehydrator](https://smile.amazon.com/gp/product/B018UR4XJI), so I redesigned it to screw directly onto the dehydrator itself in place of the original white plastic cover over the fan and heating element (see picture