400 N.E. and Rocketman. This is always more difficult to explain "On Paper"!.... When you are standing at the Workbench, as I had a Client here couple of Wks ago. with this same problem, Chequering had been'Refreshed" with a Power-Tool...Way too deep and the "Tops" dug into his skin when he gripped the Hand .If you are watching my method how to Bring it back to "FT"(I smile when I hear the Gasp of air as I put a "Bastard-Cut" File across the tops of the Pattern) But that takes it back to a flat style, finish the surface of with 400 paper, stain & oil....should make the grip feel"Original" CC/DT