If I follow the black level pattern on Avia and eliminate the one black bar that I'm supposed to (leaving only one moving black bar visible) I find my picture a bit too dark on my TV where I'm losing delicate shadows, etc. If I increase the brightness a few notches, my problem is settled. According to Avia, this would be incorrect because both bars will appear on the pattern. The bottom line is preference and common sense. I guess Avia points you in the right direction and gives you a guideline to follow, but that doesn't mean you should, necessarily, follow it to the tee. Anyone else notice tweeks which are necessary?