Sharpmaker angle for serrated blades?

[elkins45]

Anybody remember if you're supposed to use the 30 or 40 degree angle when sharpening a serrated blade on the Sharpmaker? I thought I would ask rather than try to find a functional VCR to watch the tape again.

Thanks

 

[Bimjo]

I use both- 40° on the bevel side & 30° on the back side. I'm a little weird though.