i have a question that is not directly related to the OP, but the pic of that V-bit made me think of it.
I have a lot of similar V-bits, which have an eccentric tip. Much like the above pic. So as this bit spins, the zeroing point is not the tip of the bit, but a virtual point slighly underneath (when chucked in).
So how do you accurately zero such a V-bit???