I tried both the 107 and the 103 and the 103 gave me a better chainline. With the 107 I tried the chainring in both positions and the chain was constantly trying to derail. I haven't had any problems with the 103 installed; I can just tell that the chainline isn't quite perfect by looking at it. My drivetrain isn't anywhere near silent (it's also not insanely loud), but I'm using EAI cogs, which are reputed to be noisy in some situations, and a PC-1 single speed chain, which is specifically made to allow less lateral deflection. Also, when I put the bike in my workstand and spin the pedals, I can hear that almost all of the noise is coming from the cog, even though the chain meshes with it just fine, so I'm not worried.