Originally Posted by J Miller

Bobbins; The Dritz Class 15 bobbins in the plastic box of 10 as sold by JoAnns are junk. The the sides are not parallel and they hang up on any of the bobbin winders that use the little tab to shut stop them.

I've found a number of variations of both Class 66 and Class 15 bobbins. From different thicknesses, both classes, to different curvatures of the sides on the 66s, to sides that should be straight but have a step down, class 15 plastic bobbins.

It's best to buy from a reputable source.

Cases;
I've been getting cases from my local sewing machine shop. He usually charges 20 bucks for them. Other than that I don't know of a source.
I've also been contemplating building my own. I have enough I could use for patterns.

Sewing Machine Base:
Saw a picture of a sewing machine mounted on a slab of wood. It looked as if it was cut out just so the machine would fit flush to the surface.
Then there were four legs that held it up. Couldn't tell how the legs were attached to the base though.
Something like that might be easy to fabricate.

Joe