VCutter angle?

[markymac]

I've recently acquired some new tools for my router and was hoping someone could clarify what angle I should be using when setting up a VCutter.

TOOL SETUP.png (37.39 KiB) Viewed 16572 times

On the packaging they use either an angle measured off the vertical or an angle describing the point (hopefully the pic I've attached will clarify what I'm struggling to describe)

any help would be greatly appreciated

[TDIPower]

As far as i know its your drawing B

Pete