So. I have attached my version of a stiffener list that does exactly what you are wanting. The only caveats are this report goes by item ID numbers, so unless you have set item ID numbers up for your angle iron this one will not work. I had originally set up stiffener reports based on the item name, so I suppose you could do that, but when I started estimating , I discovered item ID's were the way to go. The actual way CAM gets the overlap amount is by specifying the "Adjust Long/Slide and Adjust Short/Drive under stiffeners. You may have to go further into the rabbit hole than you want to make this work for you.