I´ve some pics from modelling the lower edge of the moldboard blade. First, a 2 mm strip had a radius formed to it and was soldered to the back of the blade.
The heat caused some unwanted bending
Milling the forward side to replicate the recess. The strip enabled a good grip in the vice.
This is the first pass with the radius mill which took care of the concave radius of the S-shaped bend. There were a further two passes made to approximate the convex radius. I still have to remove (probably by grinding) the remaining material on the convex radius.
Thanks for looking.
Stefan