Final weight without bottle cages, computer mount, or pedals: 7.6kg
Difficult to tell in the photos but the paint is chameleon blue and purple. Blurple.

Size M
120mm Stem
400mm Handlebars

Well I added some sealant and they're definitely holding pressure now so I guess it will be ok.

Now onto another question...

Anyone else who has built an 099 (or something similar), how have you handled the front derailleur cable? The frame has a fitting on the down tube to house the cable outer, leaving just the shifter cable to exit the frame. I'm a bit worried to use this because if the outer ever comes loose from the fitting I would have to remove the bottom bracket to fix the problem.

The alternative is to get rid of the fitting and just run the cable outer all the way to the derailleur. I'm just a bit concerned that there isn't that much clearance and it could rub against the tire (I have 32C's fitted).

Here are some photos so you can see the setup...

Thank you guys for your input.

I'm doing the geometry check and I find the L very close to the "54" bike I had previously.

All lower measurements are almost identical:
Same chainstay (410), 2mm shorter Front-Centre (596 vs 598 in VBR177), BB drop is 69.5 vs 70,  same fork offset (45mm)

Angles are very similar: Head tube (73 both), Seat tube (73.5 vs 73.3)

Reach in my "54" bike is 391mm vs 395mm

The main difference is the head tube (170mm vs 155mm in VBR177) which yields to a higher stack in my old bike (570 vs 556) and explains the 4mm reach difference.
Am I wrong saying that the difference here comes down to one spacer?
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Regarding the other bike (I don't have the geometry), I took manual measurements, giving longer seat tube, but slacker angle (~72)... Plus a shorter Head tube (160) gives a longer reach (I remeasured today at 405mm), The stack is actually 560mm.
I have ridden this 56 bike for 4 years.  I have played with the saddle position, it feels more aggressive, and have had 7hour rides on it.  But yeah, upon changing one to the other I feel the difference on the reach

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The VB-R-177 M has significantly lower stack (536 vs 556), Reach is not compromised (392), so it has a smaller head tube (135mm) and the wheelbase is reduced.  The seat tube is also 20mm shorter.
Here I'm afraid I need more flexibility.

I'm going with the L

Thats generally a really bad way to adjust reach. While it will make your distance to the handlebars shorter, it'll tend to force more weight onto your hands and change your pedalling dynamics putting you at greater risk of anterior knee pain.

So, here is my version of VB-R-177.

Order placed in January, delayed by Chinese new year, procurement of spokes and hubs and a lockdown.

Custom paint and decals by Velobuild
Wheels are also from Velobuild (50mm), but customized with sapim CX ray spokes and Bitex 312 hubs
Groupset is all Shimano 105 hydraulic, with left crank PM (Xcadey)
Both rotors are SM-RT70-SS 140mm (also Shimano 105 series)
Tires are Conti GP5000 TL
Saddle is Selle Italia Flite FM Flow manganese rails

I didn't build it. I asked the LBS to do it for me as it.
They didn't report issues in the compression bolt, but did report misalignment in the front wheel brake caliper too, as well as they said it was the "wrong rotor".  I fixed both things:
- I flipped the caliper mount as per Shimano manual
- When aligning the caliper, I used the business card method, but also inserted a 6mm allen key between the rotor (closer to the hub) and the caliper mount, before tighten the lower screw.  The one on top I left it at 6Nm.