So I was just able to pick up a used dura ace 7600 crank and a dura ace 47t chainring off ebay for way less than I should have paid. (yay) I am now wondering what bottom bracket I'm gonna need to get my chainline prefect on my mark v. Right now I'm using some stock hubs with a 42 mm chainline but within the next month or so I'm building up some paul hubs which have a 44 mm chanline. I'm wondering if I can get an adjustable bb or if I should just swap out bbs when I change wheelsets. I plan to use my stock wheelset in the winter is why this is an issue. I'm still pretty new to all this and I suppose 2mm might not even make a difference at all in functionality. Any help would be appreciated, thanks in advance.