@rauliruegas , Since our last discussion I have been playing close attention to the centricity of records. It is very disappointing. They also do vary form one side to the other, a lot! Even such vaunted labels as Analog Production are not well centered.
I did some research and found this. Go to 8:40
https://www.youtube.com/watch?v=c_GBlzcaWlo0.2 mm tolerance? My back side. Many records are pressed off by three times as much anyway. I am sure you have seen that. As you see in the video it is due either to operator error or faulty machine calibration which by default is operator error. Every run of records (about 1000) is QCed by pulling a sample and playing it. The QC techs are obviously not paying attention to this.
Take a test record and with a pointed knife cut away 0.2 mm from one side of the hole and play a 1000 Hz test tone. The tone will wander up and and down. It is painfully obvious to any serious listener.
I started playing records without looking at the centricity then writing down yes or no next to the title. Yes for concentric, no for out. After 10 records I put them back on the table and gauged their centricity. Picking out continuous notes I was right 8 out of 10 times. I encourage everyone to do this. The only way this will stop is if enough of us complain. There is no excuse not to stay within 0.2 mm. The tech looks at the run out groove under high magnification ( the video shows this!) Either he is off or the Machine is off. Take your pick. Having an accurate turntable does not mean a lot in the face of this type of error. The wow far exceeds the spec of any modern turntable. To gauge centricity draw a black line on a small piece of white paper and place it on the turntable's plinth. Move it around until the line visually lines up with the tip of the finger lift. Then you can watch the tip of the finger lift float back and forth in relation to the line (reference point)
What an eye opener!!!