I'm not Jack, btw, hehe, he didn't buy Hexagon yet iirc. I don't know Silo at all, but is split-loop like Fillet but leaves the original edge in place? Remember, I am new to this, so I am not sure. There are 3 edge operations I worked through, and they sound like what you are talking about but not sure. They are all Edge extraction things: Extract Around, Extract Along, and Extract Fillet. Not sure though. JDexter