How come I can't get a 42mm chainline my Shimano 600s or my vintage dura-ace double cranksets and a 107mm bottom bracket? I installed everything and then measured and my chainline was something like 45.5mm. It's not that big of a deal because I just put my old Sugino 103mm bottom bracket back in and the chainline was 42.5 which is close enough. One of those Phil Wood 102mm bottom brackets would make it perfect but it doesn't seem like it should have to be that small.
Maybe I'm not pressing the cranks on all the way? I tighten them as much as is possible with the leverage I get from a 4 inch allen wrench. My frame is a Surly Steamroller by the way. Any ideas?