Firstly, I've been a long time reader of Bike Forums and finally joined, so hi all. Secondly, i'm sure this topic has been posted a 100 times already, so if you know a thread with an answer for my question please redirect me. And now, the question:

I have a custom Marino frame that has 135 rear spacing. I am currently in the process of trying to fit a 2x10 setup onto it, and the last bit of technical "fun" to wade through is figuring out the right bottom bracket width. I will be using an FSA vero compact double crankset with a 68mm shell width on my frame. Now, most online sources show that the vero should have a spindle length of 110mm. So in my mind, to go from a 43.5 chainline to the 47.5 chainline for a 135 spaced rear hub this would mean an overall increase of 8mm, or a 118mm spindle. Am I wrong?

As a note, I contacted FSA to make sure that I had the correct spindle length and they told me it was 103 and the correct one for my application would therefore be a 108mm. That doesn't make sense to me, can anyone confirm/deny this?

Thanks much, will post pics when I'm all done.