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.

Ok, I said I'd be back with some info once I got it built. It's preliminary as I only have one ride on it so far, but you can read it here

https://trbike.blogspot.com/2024/05/ltwoo-egr-results-writeup.html

Maths was never your skill set I guess