Azimuth setting using channel decibel level on a mono LP?

I tried something a bit different and easier than some methods to set my azimuth. I wonder if it would be considered correct. The turntable in question is the Thorens TD-203 and the cartridge/stylus is the Ortofon 2M Blue. After doing my best with a mirror, I digitized a short passage of music on a mono LP with Audacity and then checked the decibel level of each channel in the Goldwave program. At first, the right channel was around 1 dB louder than the left. After turning the azimuth adjuster, I got the left channel louder. Then, after 15 or more slight adjustments, I got the difference between the two channels to much less than it had been--down to around .05 of one dB. I didn't think it was worth the effort to get the levels any closer than that so I stopped there. The audio result sounds very good, but I'm not sure I can even detect the difference between a 1 dB and a .05 dB difference between tracks. I really tried this just to see if I could change these levels using the azimuth adjusting wheel. On my previous turntable, the azimuth was hard to adjust, but the Thorens TD-203 has a very large wheel that makes it easy.

Now I just wonder if this method is really correct way to set azimuth. I never heard it mentioned as such.In other words, is a roughly identical dB level on both channels with a mono LP equivalent to a correct azimuth?