Gee guys, are we over thinking this just a bit, why not simply use a CI skillet? If it's being griddled, not grate cooked, seriously?
If you mean use a CI skillet to do the smashing, that may not be practical on the small surface of the Little Griddle mentioned at the top of the thread. Can't imagine using the typical 10" CI skillet to smash 6-8 burgers on the surface of the Little Griddle.