Filament Tub Design 4 roll

Simple 4 roll filament tub that will allow changing one reel of Filament without having to unload the rest. It's designed for the specific tub you can see in the pictures. It's also designed for the typical 1.75mm 1 kg filament reel. The holders are attached to a piece of 6mm MDF board. Most any solid surface will do.

The guides are designed to simply screw in the drilled holes in the tub (15mm hole). I wanted them reasonable tight to ensure they stay in place. They might need a litt