James Mcclendon of jmccustom knives has a video showing how he modified a 4x36 grinder to do the KITH hollow grind B & T knife.
https://www.youtube.com/watch?v=eRqh...97868018240050
James is a genius to work with what he has and to modify it to suit what he wants to do. This video gave me some really good ideas for my 2x48 Dayton grinder. 2x72 grinder or Heat Treat oven? Hmmmm..... Get the oven.