[HawgRyder]

Dependine on the valve and retainer...you may have either 7deg or 10deg locks...they are NOT interchangeable!!
I believe the 7deg ones are stock...but I found some 10deg ones in a 2.2 one time...it had been worked on...and the replacement vavles/retainers/clips were of after-market design.
As to weight...Titanium is lightest...or Aluminum...but longevity becomes a problem.
Bob