Secure Spool Holder

Every time my spool was about to run out of filament, it's weight was to light to hold it in place, thus the printer's pull made the spool fall to the ground. Now it doesn't fall anymore.

There is also a slider that can be used to hold down the holder with a couple of screws. I have it on top of my "Ikea Lack" build.

To assembly, print all the parts then remember that parts A and B go together and they are fix. C and D go together and can slide over part "_base". You will need six 608 bearings total.