bianchi is correct, that is indeed a 6 degree stem, in the negative position. I did ride a -10 for a bit but i found that when i stood up to climb with my hands on the hoods, it didn't feel natural.
Gc3 I had a black crankset but because i am getting a stages power meter, I had to go with the ultegra.
yojim, what is the correct gear combo?