I had 3 problems :
- Rear brake mount was not flat, had to face it AND file the connection between the two screw holes (because the facing tool only face on 10mm diameter).
- Seatpost doesn't hold, Tantan says 8-10 Nm but even with 12 Nm, Carbon Paste and alloy foil from can, it slips. I need to find a solution.
-The front derailleur mount is also too much to the exterior, wich leads the derailleur to touch cranks arms. I tried with 105 di2 and ltwoo erX. As well as with ultegra cranks. I had to put a 2mm spacer on the crank axle
Otherwise i only did a 50km ride on the flat, nothing special, i'll see in the mountains.
Edit : the frame with derailleur hanger front and back, rear axle and screws was 853g in size 49, clear coat and black paint