I've got a question about regulating in different positions. Lets say I've got a watch running +15 sec. fast face up and I regulate it to+ 2 sec. per day face up, but now it's running -15 sec. a day face down. If I adjust it to run -2 sec a day face down aren't I right back where I started? How do you regulate a watch to different positions without affecting the regulations you've already done?