Yesterday I put a size L bobbin into the Babylock Zest. It was very difficult to remove (I had to destroy the bobbin to remove it).
The manual says the Zest requires a “Class 15 bobbin”, and internet search seems to suggests that a size L bobbin should work (although the reverse is not true). They are allegedly the same diameter but different thicknesses.
It darn sure didn’t.
Is it just me? All of the bobbins for the Janome and the Babylock embroidery machine are size L. I was extremely gentle and careful getting the size L bobbin out of there, but if the bobbins really aren’t interchangeable we should probably segregate and label them.