I think the variantions on "W"s depend on the method of forge welding. Toby probably used his power hammer more than press. I used only press, so that the deformation on layers are more intense just on first weld (i guess). Also, I observed that if your starting steel sheet are thin, the less welding steps will be necessary. So, take a look what occured after the 3rd weld from starting. In my work condition (23 layers of alternate 2mm 1065/15N20), I´ll stop the next 'w' on 2nd weld before forming the cube for the "V" cut, otherwise the feather will be excessively thin.