You bring up some interesting points.
I never thought about rulers getting "bowed" etc.
The oil? I too have wondered if it goes bad but would forget
to look it up.
Surely didn't know it was made to evaporate. I have more than
one machine. That's GOOD info right there.
Fiskars makes a REALLY good, inexpensive scissor sharpening tool,
unless they have been sharpened a lot and the blades are getting
thin.
I learned about the product from a lady that cut fabric for a living.
She said she sharpened hers once a week.
I think we forget to do maintenance on some of our stuff sometimes.
Never thought about the bobbin "round". Thanks bear
