DSD
135
A Lange Doublesplit would be nice...
but I think I will use my trusty GO Sport Evo chrono. Not the most elegant design - not a column wheel, but a well built, very nicely finished modular chrono that serves me quite well 
Finally - A very productive use for my chrono!
I have read a number of posts about the usefulness of the chronograph complication and who uses it for what. While I find timing the grill time of a nice cut of steak to be a productive use, I grant you that one could just as well accomplish the same with...
How times have changed...
Ten years ago, I remember buying a digital stopwatch specifically to sit for the NY exam. Having a Datograph strapped to the wrist would probably have been too distracting for me! Good luck with your endeavor. Regards, Tom
You definitely need a flyback chrono ...
... since it can save you vital time! Regards, Marcus