Finally done.
The front hub's rotor attachment point is a bit wide. The 180mm rotor have a very narrow clearance from the fork. Barely rubbing the fork.
3 things that are likely to change.
1. Chainring, the 38T temp is tight, barely fit. Coz I moved a spacer to the non-drive side. See pic.
2. The 780mm handlebar might have to go, it's just too wide for my taste.
3. The stem might go, more for aesthetic reason.