Does anyone run a King cog with a nine speed chain? If so, I assume it must work OK? I know that the cogs are spaced for eight speed, but was wondering if anyone knows if a 9 speed chain will work fine? Reason I ask is I just snapped my 19-21 Ultegra cassette carrier (the 19 and 21 tooth cogs attatched to the Al carrier), and the LBS couldn't find a place to get a new 19-21. So I want to get a King cog, but don't want to replace a perfectly good chain. Thanks.