............ when you get to this point with a vintage Valjoux 7750 without losing or breaking anything.
It's neither. However there are two spots that tend to trip up the less experienced. One is setting the calendar plate on the dial side, without disturbing the spring for the hour hammer - it can go flying off pretty easy. The other is setting the automatic bridge side on without disturbing a number of parts that are placed on there as you line everything up. @JimInOz - good job mate!
That’s pretty much the feeling I get on a Sunday afternoon when my kid falls asleep for her nap… I’ve made it 75% of the way through the weekend and no ones missing or broken…. Time for a beer!