Inner Ring for 5lb filament

Update: What was I thinking?!? I have uploaded a second file. Print six of these and form them into a complete tube. Again, I haven't tried to print yet, so I'll leave this as a WIP.

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From a friend, I got some spools that almost are exactly what I need. This gets them to almost perfect.

This thing expands the spools inner diameter to 5.25".