Thanks for all the charts and links everyone. I think I'm getting close on this. Long story short I'd like to upgrade the group on my bike from my tiagra/fsa mixed triple to a full 105 double group. I'm not using the small ring up front and would really just like to make a moderate upgrade to my bike. I'm looking at some 5600 sets since I prefer the black anyways and don't need the most modern set just for a color upgrade. However, I would like the internal cable routing and I think means I need to get 5700 instead. Is that right? The best I can tell so far is that I have a 68MM wide bottom bracket and my frame is not threaded. It's a 1.5 if that matters at all. Thanks in advance everyone!