Thanks- I already own that book and it's more about using them than about attachments - in fact it has about 1 paragraph about the top clamp ones - but at least it does say there there are many types of them, but nothing about what type fits which machine.
I'm trying to track down the makers and time frames. I've got such a large selection of attachments, and I've got plenty I have no idea what machine they fit. That's why I keep buying more machines LOL!!