Flashforge Finder Filament Spool Shelf

I wanted to make a separate spool holder for the Flashforge Finder in order to feed filament from non-proprietary spools. I found Phil_Read's excellent construction but found it a little bit too elaborate, and I didn't have a metal pipe...

Based off Phil's base model I've created a base that can hold a shelf (I use a wooden one I had spare) using an M5 bolt and a fitting nut (I use a wing nut myself). In the shelf I've drilled a hole and using a filament guide that goes in the hole. (I've mad