This is on base circle? I would readjust em again by getting the dampener on #1 TDC compression & doing both #1 in/ex then a 1/4 turn & doing #8 & so on. You can cut a strip of paper 5.694" (5&11/16) to use as a ruler on your dampener. pull the plugs will make it easier (we don't need more exercise do we!). What Supercuda said, slack is noise.