57mm NuNus Spool to Ultimaker 2 Adapter

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The adapter ring clicks securely onto the 57mm NuNus filament reels, instantly making them usable with the 50mm spool holder found on the Ultimaker 2. To achieve this compatibility, simply print two of these rings and snap them snugly onto either side of the reel. This clever adaptation allows the diameter to match perfectly with that of the standard Ultimaker 2 holder. I opted for a solid 100% infill when printing mine, which greatly enhances stability.