I checked it after a washing, and the slack was perfect, so it must have been hot when I checked it at a red light, so I left it be. Alignment ruined my last chain so this one has been a straight four times! (can't say triple checked) I heard it again today but faintly, so it must just be a new sound for me. Runs so smooth I can't bring myself to think I have a problem, I'll just have to see if it gets any worse. Thanks.
"The day I stop getting the buzz, that's when I stop doing it. The buzz is fantastic." - Guy Martin