I had my LBS install Chorus on my Lynskey (1 1/2 years ago). This was before I started doing my own wrenching. To grease the bearings, the crank had to be taken out. I did that, and was literally amazed at how easy and simple it was to do.

Regarding facing, I'd still let the LBS do that just because I don't need those tools often enough to justify purchase. Campy gives the dimensions that will work.