So, here's my experience with the frame, btw i bought it from Sequel Aliexpress, so they sell it with different handlebar, they also include ceramic BB:
Positives:
1) The frame is super high quality, fork steerer is round, bearing seat stay is also perfect fit without wobble, inside is clean and not bad.
2) It's stiff, responsive as my aluminium frame, but much more comfortable (i'm living in Uzbekistan and our roads are not that good), i'm using 28c tyre btw. But some folks including my LBS master and friend who saw how i ride and tried bike by themselves, said that it wobbles a little bit and they said that it's not a bad thing, but i didn't noticed, coming from Aluminium frame and and i wanted the same stiffness.
3) Handlebar is also stiff, and really good
4) I thought that i need to replace ceramic bearings in BB, but by a spin test, it spins extremely good.
5) TanTan made a really good thing with their seatpost, that have rails like TT bikes, allowing you for wider range of movement.
Negatives:1) Handlebar, seatpost clamp have such a tight fit, that they need to be polished or you just couldn't insert them.
2) LBS master said that he tried everything, by couldn't route cables internally, they are visible under stem, he said that holes in handlebar are small.
Sorry for my bad english and low amount of photos, i didn't have time to make them
*update*
Components and everything else for the bike including prices you can find here:
https://docs.google.com/spreadsheets/d/1NXJkVPyU0gNzbjs-0Z0nKeOFNHTmwJx_35oN1GhVfI0/edit?usp=sharingThe overall weight is 8.3kg