Quote Originally Posted by irving2008 View Post
By going for 2mm wall section you might have reduced the weight by 30%, but you've reduced the rigidity too by 30% so where you had roughly .045mm per N deflection you now have .067mm per N in the Z direction and 0.27mm per N v 0.19mm in the X direction. Yet another reason why you can't make arbitrary decisions without understanding and considering all the implications.

Also 2mm does not give any thickness to thread into. ..Clive