I love my 3878's. The Ju Air is very very nice.
^ Yep get both. They are freakin awesome.
yes, but lacks many important features including silver chrono second hand instead of white like gen.
according to what Domi has said, modding the ZF 3878 is quite impossible and he won't provide such solution to any watch with data wheel included.
I think the new movement at sec@6 is quite stable (knock on wood). I've had the 3878 continuously on a winder for over 2 weeks straight and also tested the PR and it was 44hrs. Not bad I think.
The timing is also awesome. The teardown of the movement by ZF gave me more confidence than before. The use of a single gear to move the seconds is much better than using 3 as before