DIY Filament Dehydrator

This is based on the multitude of DIY videos and articles about adapting a food dehydrator for 3D filament use.

This extension collar is designed for the [Rosewill Countertop Dehydrator](https://smile.amazon.com/Rosewill-Countertop-Dehydrator-Adjustable-RHFD-15001/dp/B018UR4XJI/ref=sr_1_1?keywords=rosewill+dehydrator&qid=1578091038&sr=8-1) which looks mysteriously like the [PrintDry Drying System](https://www.matterhackers.com/store/l/printdry-filament-drying-system/sk/MNXQRWQC)'s dehydrator.