Looking for plug read / mixture assessment
Looking for plug read. Reference attached image. Both plugs are from the same 912ULS #4 top. One is from ~60 hours ago, prior to a plug change and needle clip adjustment. The other is current. To my eyes, one is too lean, and the other is too rich (especially considering this is the lightest plug/location of the bunch). Home airport is 200 MSL, and most of my flying is below 6000.