Very nice cutter. Makes me wish I had a mill. I have to do operations like the ones shown on my lathe. I am curious what kind of carbide you use that can withstand interrupted cuts like that in rusty steel. The carbide I use breaks instantly when I try to cut the rusty scale off of a piece of steel. I end up regrinding a HSS cutter often before I get rid of the scale. After the rust is gone I have no problems with HSS or carbide. I do use HSS the most.