I built this bike with 105 for my Growing Nephew. After one season we discovered he wasn't growing enough. I am giving up my GT Edge Aluminum in Trade to get my Guerciotti back.
Not sure how I'm going to build it up.
Three options I have now.
Campy NR top to bottom with Large Flange hubs.
Campy Mix, Chorus, Athena with specialized hubs as on my GT EDGE
Or..Build my first single speed. NOT SURE YET>