Please help. I got the sewing machines for the Toy Drive yesterday and I want to include some extra bobbins. It seems there's only one in the box. I bought some basic sewing supplies and among them 4 spools of thread. On the box it states that you need Class 15 bobbins. I have many Class 66 bobbins for two of my machines and they seem interchangable with the 15's except that the 15's are metal and the 66's are plastic.
Anyone know if I can just send the plastic ones along?