While adding 4 more panels below an existing 4 we changed a few angles. The uppers are re-set closest to year around average angle, and the lowers and set for summer for now. The outer two of the uppwer are tilted 2.5" each toward their own hoeizon. AM hipong to gain a few extra minutes of daylight collection, and can surely spare the top dead center peak area. We will see this month.