I mentioned this above. The balance bridge screw is the longest plate screw. I see these mixed up all the time.
There is a lot of documentation on these Landeron movements. They are easy to work on. Good starter chronos.
I think I am back to around a dozen or so plates and things. Would that cases and case parts come without the other bits and pieces. I have not had much luck finding empty cases.
I personally have found that it is best to test fit and ajust the chrono levers back on before assembling the train. (Book says remove balance) I also found
@Archer suggestion of pressing the eccentrics out is the best way. Turning them can a cause issue. They are not threaded.