Well, it seems as though my choices of aluminum's are greatly restricted by large quantities of purchase. 4032 would have been the perfect aluminum, but upon research I can only find 4032 in diameters of up to 2 1/2 inches. And the aluminum's such as 2018, 2016 of which they use to make Pistons are not playable with Nick assail. Even the true to its 6061 is going to be costly. But at the end of the day, I am forced to choose 6061 T6 extruded. Wish me luck
