By the time you get the aluminum thickness to equal the tensile strength of Chromoly or IT there is no real weight loss advantage and imo Aluminum is way to soft and brittle to be used in a application like that.
Every material has its place in certain application but aluminum does not belong in a steering stem application.
If ya dont believe me read the link i posted.
http://www.ihpva.org/projects/practicalinnovations/materials.html
My question is 3#s lighter worth your life?
We are just 2 spots from the bathroom and ya bringing Christy and our little one, inlaws will be there as well.
We are leaving the dogs @ home this time, dont need anyone trying to still my new pup.