On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote:

Cutting two lengths of tube is much easier than cutting and threading
an already hardened chromoly mounting bolt btw.

I'd be interested in the source for this claim that Shimano N600 brake
bolts are

a) "chromoly"; and
b) hardened

of course, if it's of the nature of "my 'experience' says so, and I'm dead
clever, I am", that will get the weight it deserves.