Also, by testing it out (and from reading the manual of the Helene Curtis Empress perm machine), I found out what all three switches do. Very cool.
I already have at least three models who want to do a video with a perm machine. So my focus for awhile will be perm machine perms. Of course, if a woman wrote to me about wanting to shave her head for a video, I wouldn't turn her down. :D