I'm about the pull the trigger on a Campagnolo Record Pista crankset and BB for my new track build. They seem to be the lowest Q-factor cranks out there. My only concern is that a lot of people have issues with chainstay clearance with these cranks. Is there any fellow Slowtwitcher who knows how wide these cranks are at the end of the crank arms? a few months ago I came across a technical drawing of them online, but after hours of searching, I just cannot find it. I'm getting 170 mm long ones, but 165 mm measurements would also be of help.

Many thanks in advance!