Most examples in the transmission database ( http://www.lfgss.com/thread3372-6.html ) show most people using BB between 107mm and 110mm for different Stronglight cranks with track hubs, but yours could be completely different. I'm not familiar with Stronglight 80 cranks.
You don't have an old BB around that you could fir and then work out how far off it is from straight chain line do you?
Most examples in the transmission database ( http://www.lfgss.com/thread3372-6.html ) show most people using BB between 107mm and 110mm for different Stronglight cranks with track hubs, but yours could be completely different. I'm not familiar with Stronglight 80 cranks.
You don't have an old BB around that you could fir and then work out how far off it is from straight chain line do you?