Yes, Why not give Surefire a call?
That is the fanboy response.
Their QC doesn't speak for itself -- no manufacturer's does.
On other forums, manufacturers respond directly when a question such as this is raised.
And I am not the one raising the question -- the OP is.
But I believe that everyone here deserves to see the answer -- even those who object to the question being asked.
Surefire has the answers; everyone else can only speculate.