Yeah it’s not much. I think the biggest Takeaway is that the curve that were talking about is actually a design aspect of the razor that the manufacture is factoring in. What you wind up with is a very slightly concave bevel plane as opposed to an implied wedge shape. Now the 6’ radius across the width of the stone provides the contact isolation for offsetting slight variances in terms of minute geometry issues.With a 25' radius you are talking about a tenth of a degree per side.