Some of you might remember that i picked up some outside work a little while back and bought a pncnc 440 to do it .

I've been asked to do a second job for the same guy and I'm not so lucky for it to be a single operation with a single tool like the first job .

What do you guys feel is the minimum amount of material to grab onto .
For referance the part is roughly 4 inches square and about .200 thick aluminum .

I was thinking about sinking some mitee bite knife edge clamps into a fixture plate and only gripping on the top edge if the clamp @ about .030 so I can use 1/4 stock and have just enough material to be able to face the part and profile the outside edges in one shot .
And have a bare minimum to face off in the second op

My goal isn't accuracy, just quick with a nice clean finish on the outside edges .