Bobbins for intarsia

When I had the privilege of meeting nophead and his good lady last month, one of the questions I was asked was whether I had made lots of useful things for my wife. Reluctantly, I had to admit that I had only made her a keyring, so far.
My opportunity came yesterday when she asked me for help with a specific problem. My wife enjoys making things as well but her filaments are more of the sewing and knitting variety. Recently, she has been experimenting with a kind of knitting called intarsia, wh