The Profile Design part is the
aeroport You will need some shimano parts:
RS910 junction
JC41 junction
JC130 junction (Y-cable)
Jc130 goes between brake levers to reduce from 2 cables into the junction down to 1.
For the stem, if you need to get low the Aeria Ultimate is good. But if you don't need the drop in stack, wait for the Tri Stem - it's lighter and cheaper. Production will be done in March, so a month or two after that to be available to consumers I guess.