if you can score a vajoux 72 without breaking the bank on the rest of the watch it currently sits in, it opens up a whole world of modded/franken chrono reps that can be built. Never actually built a watch since I lack, oh you know, skill, know-how, equipment...just that little stuff, but i feel like conceptually it's not terribly difficult as long as i can source parts and have a good watchsmith to do the work...so the hunt begins for the movement and the rest will just have to be thought of later...a definite step above the lemania based chinese seagull chrono movement which isn't terrible, but you get what you pay for.