Just happened to see your thread and have an ST50 and was curious.
The pro settings are within the custom settings, they are not in the service menu.
The service menu should only really be accessed if you know what you're doing.
I believe for a professional calibration, changes in the service menu are necessary along with the regular picture settings, but I may be wrong.
Anyways, would be interested (I'm sure there are others) to see what a BB calibration has done on your display.
Although, not sure I would go into my service menu and start making changes.
Klipsch RF-52 II // RC-52 II // RS-42 II
Klipsch KG 2.5