I'm not sure if i understand. Do you mean the grade of aluminum? What grade is it?
edit: After some research I see that they used Al2011 on some models. There is a lot of copper in that alloy which is why it's a PITA to anno. It seems that there are ways to do it better than before but nothing that looks like it would be on par with 6xxx grade. Also, with it being such a difficult alloy, most processes that work with it are more or less proprietary so you might be hard pressed to find any helpful info. Good luck though
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Last edited by jeepscantshootguns : 02-03-2014 at 09:41 PM.