sorry for my rough wording.
As a professional watch builder, they spend all of resources and technology to meet their vision.
As you said that watch engineer spend their resources and time to meet 8 days and sustain stable power to run the watch. In my view, such watch is fail! Totally fail to sustain 8 days. It is only ONE year! watch became less than 8 days. How can I keep it 3 years or more?
You said +/- 10% is ok? I am sorry that I want to say +/- 10% is fail. May I?
I don't want to make any people angry but i want to share such case. I accept it may be individual case but totally make me disappointed on JLC (both watch quality and customer service at hong kong region).
Should I bring back the problem watch back to hong kong repair center? or just sell it