Adventurer3 Spool Extender

The Adventurer3 is rumored to be one of the best starter 3D printers, partly because of its enclosed print space. The outer cover that encloses the filament spool must be in place in order to control the environment inside, especially when printing ABS. However, the standard 1KG spools sold even by its own manufacturer are way too big to fit in its small spool compartment. You can trim off the outer ring of the spool to fit the diameter of the machine (if necessary), but there is no provided way to keep the spool from falling right off the machine! There are many "solutions" to this problem available, but none that I found as elegant as this. You still won't be able to close the door, but for PLA it's just fine and this should plug right in and hold the spool at its center in such a way as to allow it to freely spin.