At the moment my machine is lying dead, Its beating heart of a BoB stilled when the magic smoke escaped. When it lives again, I will have to try out the drag knife, cutting A4 sheets of thin vinyl with rows of closely spaced parallel lines. Then I can divide the sheets down the middle, to make combs fine enough for mermaid's hair.

I saw one good idea - to hinge the front section of the comb. It made tool changing easier.