Quick question about the saddle bolts, how do you tighten a saddle without a cutout in the middle?  I realized that one of the bolt faces upwards, and if there's no cut out in the saddle, I have no idea how to tighten it.

The frame has been ordered:

"The current lead times for new production are about three months, I will keep you posted then."

A short review of these 'The One' style handlebars from Kocevlo:

https://www.aliexpress.com/item/1005004973884034.html

Bought in 380*100mm to fit a 2023 Merida Scultura (FSA ACR). One-piece bar and stem was a good opportunity to replace the heavy separate FSA stem and Merida branded handlebar that came with the bike. I bought this particular bar as it seemed to be compatible with the FSA ACR system.

Pros:
- Weight: 330g for 380x100mm - up there with some of the seriously lightweight options.
- Stiffness: I'm a lightweight climber-type build (67kg, 900w peak power) so I'm not really stretching these things to the limit, but there's no incredibly obvious deflection when I sprint out the saddle.
- Shape: Excellent modern compact style handlebar shape.
- Price: 100USD including integrated Garmin mount kit (which seems nicely made)
- Minimalist looks: only one sticker, and easy to remove by fingers

Cons:
- Routing: I didn't do this myself but my mechanic said that the bars had quite sharp edges inside that made routing the hoses particularly difficult. This was brake hoses only as it was a 12sp Shimano Di2 build.
- Shifter clamp: Shifter clamp area was undersized and clamp needed to be shimmed.
- Headset compression: my mechanic said he had to modify the bottom transition spacer as the Scultura top headset bearing sits fairly deep inside the tube - without modification it wasn't making sufficient contact to set the preload properly.

For the price, seems good, but be aware of the potential issues.

- The handlebar is just one of the cheap generic ones from aliexpress. It feels extremely flexy, I'm not sure I trust this one.
You can often find it branded as Kocevlo, but there are many other brandings too:
https://fr.aliexpress.com/item/1005006028345937.html
Strangely, their website shows a completely different cockpit and headset assembly:
https://hygge-bikes.com/products/high-performance-integrated-road-handlebar

Both Colnago and the Look bikes the OP showed as example have far less aggressive geometry than 017. That frame in general would be unrideable for people under 175cm or so because of its insane 390mm reach even with the lowest eize. Size 51 (equal to average M size frame) has shorter reach than 017 frame in size 49, which is equivalent to size XS   

What about that frame:
https://www.yishunbike.com/product/r068-dperformance-road// in Size 56

I just looked at the review on YT and there is no comment like what you said... Could it already be removed?