Woodcut bowl saver question

For those of you that use the Woodcut bowl saver have you left the cutter in its original shape? I was using mine today and it worked pretty well on 3 bowls and a clear failure on the fourth. I was talking with a friend after he witnessed the failure and he suggested that I regrind the cutter to have a vee point. I know the Keltons and the Oneway cutters have been reshaped to have vee points. I am open to suggestions.