Opinions - Just got my Speedmaster Pro serviced, appears to be losing time...

Well....some errors in that article so I would take what is said there with a grain of salt for sure. For example:

"Most modern watches have a lift angle of 52 degrees."

ETA is the most widely used Swiss movement maker, and no ETA movement I can think of uses 52 degree lift angle. Rolex uses it, and this person seems to be Rolex centric based on the photos, so I suspect that's why he says this.

"Some other settings are present, for instance the new Omega Co-Axial movement angle is 30 degrees."

This is wrong on one level and potentially misleading on another. First, Omega co-axial watches use 38 degrees lift angle, not 30. Second, even if you had the right lift angle, without a special programming mode for co-axial movements that these cheap machines do not have, you won't get the correct lift angle on a co-axial watch anyway.

And he really doesn't teach you much about how to really use the machine. As we have seen in several threads discussing this, getting one of these machines can lead to more questions than answers. Not always a bad thing, but if you get one of these machines, you really need to learn how to use it properly to get anything from the numbers you see.

Cheers, Al

Machine timing and wrist wear maybe not always line up because each position is timed in a controlled state. If you wear it and it is angled in positions where timing is negative then it will show more time loss because COSC is an average of the 5 positions. It should be close but slight variances

It's not 20 seconds, per this post he made a while back:

"Ok, after setting to the second with time.gov and letting exactly 24 hrs pass, my watch lost 9-10 seconds."

And I don't think anyone has said 20 seconds off per day would be okay...

I don't think anyone said it was put in the cleaning machine fully assembled, so I think assuming that is the full extent of the cleaning to be done is a bit much.

Rolex does in fact advocate something called "pre-cleaning" where any parts that would be damaged by cleaning solutions are removed (dial, hands, date indicators, etc.) and the assembled movement is cleaned. Then the movement is taken apart, and cleaned in a disassembled state before being put back together. Rolex feels this will allow easier checking and adjusting of things like end shakes (they are known for having end shake issues right from the factory) and being able to see wear better. Personally I don't follow this procedure, because seeing the products of wear in the movement can tell me a lot about potential problems, so cleaning it before taking it apart is washing away clues to potential problems for me.

If you have been convinced or have convinced yourself that the watchmaker is not competent, then find someone else who you feel is. Certainly doesn't have to be Omega as this is not a terribly complicated movement to service all things considered.

If you are willing to give the guy another shot, then take it back and tell him your long term testing is showing a loss, and have him check it again. I have no idea what sort of warranty or promises were made with regards to the timekeeping, so hopefully this was clearly talked about before you left him your watch.

Cheers, Al