Did anyone build the bike with 2by mechanical shifting? I'm struggling with routing the cables through the headset. The problem is that the exit port for front brake is on the right side of the steering tube for some reason so I end up with 3 cables on one side and 1 cable on the other side of the steering tube wich results in steering pulling to the right when assembled.

I finished the Build today after receiving the wheel set.
I've also ridden the first few kilometers to set every adjustment and get a first feel for the bike. The build with pedals and bottle mounts is about 7,5kg.

The mechanical shifting works fine. It only needs some fine tuning. The bike feels very good and stiff. I have to say that I do not really have a comparison. Only my aluminum gravelbike (Trek Checkpoint). I'll also post my impressions after a few longer rides.

I think the frame fits me pretty well with size 54. I'm 175cm with inseem of 82. But after only 10km I don't know exactly.

My personal Pros and Cons so far:
+ Good frame  and parts quality. No bigger problems yet.
+ The build was good with some smaller problems.

- front derailleur hanger not so good for mechanical Shimano due to the missing support for the stabilizer screw.
- paint quality is okay (small imperfections here and there) but the clear coat is very thin so that I already have some smaller scratches. I think the paintjob should be clear coated at least 2 times.

As already mentioned by other people the carbon in some areas (downtube, toptube) Is very thin. You can easily flex it with your thumb. I don't know if that is normal for that kind of frames. I just want to say it.

All in all I'm very happy how it turned out and looking forward to the next rides. The whole build was about 2500 Euro. For that price I can't buy a branded Frame with carbon wheels and group set.

The hanger is fixed by 4 screws. So if they could provide a different hanger it could work.

I'll definitely give updates when I know something new.
So far I can't go on with the build. That sucks.
If I have to go with electronic shifting, the build will be mich more expensive than planned. And I also really like mechanical shifting.

While I don't really understand the squared design of the downtube, I can not imagine that an average rider would feel any difference. Especially because I guess the front wheel will make the bigger difference in that area and It should kinda shield parts of the downtube from the air flow.

I think the rider position, clothing, ... will make the biggest difference in aerodynamics.

Have you had many seat posts break on you in the past?  Thinking that could be catastrophic for the rider