Yeah. it's a matter of the material being stiff enough to stay down on the table. I'd be worried that as you begin to cut, the tool starts pulling the material up, or it just chatters so that the edge is worthless. The former might be mitigated by using a down feed bit, but I'd definitely have someone experiment a bit before you made such an investment Some cnc lasers can cut thin aluminum, but I believe the power requirement is at least 250W - and they're expensive. Fritz, have you tried cutting thin sheet metal? If so, what were the results, and are there tricks that make it work well?