SURPRISE, Ariz. - Every new technological toy needs to go through a little beta-testing on a small sample size before being released to the general public.In the Rangers' case, meet Zach McAllister, v2.0.As the club turns its gears towards the future, incorporating data and technology to build better players and create a competitive edge, McAllister, a veteran reliever signed just over three weeks ago, is at the leading edge.