I have a feeling that will be easier said than done. A 6 pound aluminum case will have to be very well engineered to stand up to the abuse it will get when checked as baggage if it is even possible. The $430 case that S&S sells is well designed and about as light as they can make it and still be adequately robust. It weighs 17 pounds in it's lightest incarnation and variations of it approach 20 pounds.