MGOOF : Modern groupset on old frame

Long time admirer of this thread.
Finally got round to my own build. My new summer ride, just in time for winter!
I know you guys like details:

Team Buckler Colnago Master Piu

• Campagnolo Chorus 11 speed groupset
  
• Mavic ksyrium pro exalith sl with Vittoria corsa controls
  
• vintage 3t quill stem with nitto m109 bars
  
• vintage Campagnolo aero seatpost with Selle Italia carbonio slr saddle
  
  

Total weight (without pedals) 8.5kg - pretty decent for steel.