Any question answered...

I'm pretty sure,
using vern calipers i measure the:

• left side of seat tube to right side of the chainring, and
  
• right side of seat tube to left side of chainring
  then the mean of the two is 45 mm
  

What torque setting did you use when tightening the crank bolts? Did you lubricate the tapers and the bolt threads and under the bolt heads?