I have 3 Nor Bobbins and 34 spools. I set up an old UNI box ( pencil box ) to hold it all. The spools I carry are wound with various colors of UNI thread in 6/0, 8/0 and Sheer in 14/0. Small rubber o-rings are used on my nor bobbins to hold the thread. They do have a learning curve and take a little time to get used to. I do use other bobbins on occasion for heavy, specialty or silk threads. I use a renzetti Presentation 2000 vise and a bobbin cradle. The thread is held with small elastic bands I made.
Box for bobbins
Ron 
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