I bought one of the white sidewinders. I knew my Viking (Quilt Designer - green ones) bobbins wouldn't work on it but I have 3 other machines that I can use it for. I didn't realize the pink one would do Viking bobbins until reading this. I won't buy another one tho. I just buy 2 spools of thread and wind a bunch of bobbins before I start a project so I don't have to stop and rewind. Machine is easy to thread but I get frustrated having to stop when I'm on a roll during a project.