Hello all. So I am doing burgers for some friends tomorrow. I want to wow them yet perfect burgers continue to escape me on the egg. I have 2 pounds of 80/20 ground meat. I like my burgers larger as far as circumference is concerned but thinner as far as thickness is concerned. Every time I get them formed and cook them they shrink up and don't even fill the bun. Does anyone use a binder like an egg or bread crumbs to keep the patty together with a thinner approach? Any and all guidance welcome.