quiltingdoe

We just purchased a Janome 350e Embroidery machine to use in our after school sewing program.
I have never used an embroidery machine; but I understand from reading some of the posts here that the bobbin thread used is very important. The machine came with a spool of #90 Janome thread which is to be used for the bobbin thread.

We would like to purchase prewound bobbins, but the ones we see are 60 weight thread.
Can we use these prewound bobbins or do we need to wind our own using the #90 thread?
Where is a good place to buy the prewound bobbins?

Also, we understand the stabilizer is very important, too.
What brand and weight of stabilizer works the best.

Any comments will be appreciated.