Your Janome is a new machine that cost you a lot of money and costs a lot to fix. If you need bobbins you should buy the Janome bobbins that are bobbins made for it. The few cents you might save using those old Montgomery Ward bobbins could cost you a lot more in repairs to your Janome and a lot of frustration when you can't used it. If you can't afford a few new bobbins, you maybe can't afford to sew.