The Grace company sent me a brochure on how to set up the stitch regulator on the frame etc. and one of the pages shows how to move the switches for which machine you are using.
If you need me to send you the pdf, please pm me with the make of your machine, I will check if it's listed.
They sent me the brochure free because I was asking about how to set up since I would have to order by mail, I do not have a dealer any where near me.
GEMRM