Hello, just got bumped up to the 4 color hamada b452a, and had almost no training on it. We switched from a thicker poly plate (.008) to a thinner metal plate (.006). Had to play around with a few different fountain solutions, stuck with the one produced by the plate manufacturer, but I've been having a toning issue with the tail edge of sheet/blanket not staying clean and building up ink over time. It only seems to happen on the C/Y units, and after adjusting stripes countless times I'm a little dumbfounded as to what it could be. It seems if I open the metering roller to the chrome pan roller it helps, but then it's a fine line of almost too much water. Any suggestions?