Finally finished and tested my first ever build. Rode only about 100 km yet, but like it really much.

Frame: Tideace GV201, size 54, pearl white
Handlebars: Lexon UNOX 500-80
Seatpost: Elita One 0mm offset
Groupset: Wheeltop EDS GeX, long cage
Cassette: ZTTO SLR Gen 3 12s 9-51t
Chain: YBN SLA1210
Crankset: Magene PES P515
Chainring: PASS QUEST 40T 0mm offset
Bottom bracket: Token BB47V24
Wheelset: Elitewheels ENT-DISC 40 from my previous bike
Brakes: ZRACE XG4
Rotors: Shimano RT56
Tires: Continental GP5000 32mm
Pedals: Crankbrothers Candy 1
Saddle: Ryet
Handlebar tape: BUCKLOS
Bottle cages: Kocevlo

The total weight with pedals and all the cages and mounts is about 8.5 kg. However, the wheels are quite heavy at 1700+ grams. Planning to build two other sets for road and gravel. Must be close to 8 kg with the road rubber and still about 8.5 kg with some fatties.

The total price is a little more than $1900, except wheels, tires and pedals, which I already had. Most of the components (except chain, tires and pedals) are from Aliexpress, Taobao and other Chinese marketplaces.

I'm 177 cm with 81.5 cm inseam, and size 54 frame with 8 cm stem fits perfectly.

Thanks to everyone on this topic for tons of useful info. And thank you @KopytoNieBladzi for the color scheme inspiration. The handlebar tape might seem a little bit odd on the photos, but it looks so much better in real life, in combination with blue brakes and bolts. Some other blue accessories are already in the shopping cart.

Some component notes:

The ultralight (303 g) 9-51t cassette works flawlessly so far. Had to screw in the tension bolt a little bit more to tension the chain properly on the 9t cog.

P515 crankset requires 2 mm of spacers to fit on the frame. It would work with 1 mm too, but some sand and dirt can cause rubbing. I also added 1 mm spacer on the left crank for balance. There is enough crankshaft length for that.

At first I bought a 44t chainring with 3 mm offset (Wuzei), but it didn't fit. The space between the chainring and a chainstay was a little bit more than 1 mm (with 2 mm of spacers on the crank). I ended up with 40t no-offset chainring.

ZRACE brakes work well but don't blow my mind, considering that this is 4-piston brakes on (kind of) road bike. The pads are squeaking as hell, will change them.

I've got Thinkrider X2Max and Magene PES-P515 spider based powermeter, and X2Max always shows about 10% higher power. Both devices were calibrated many times, which doesn't help. Is it possible to adjust the X2Max readings somehow? I can't find such option in the Thinkrider Tools app. It's possible to tweak the Magene instead but I believe its readings more.

I actually don’t have experience with a chainring this close but it’s just a bit of gravel or mud away from starting to eat into the paint. I’d add another.

I'm not sure that 1 mm more space will be enough. How much clearance is considered to be safe?

This also kind of makes me consider a zero offset chainring if I go the 1xMagene route and live with the chainline.

Many people don't have problems here, even with 46T chainrings, but my case is different, which is strange. This is my first build, may be I did something wrong, but I don't understand what exactly. I would be very grateful if someone could tell me. I put a 1 mm spacer on the shaft between a nut that holds a power meter and a bottom bracket. The bottom bracket model is Token BB47V24, installed without any spacers.

What does it look like with a chain on it? My guess is that the chain will not even be able to get in there, will rub, or be very close to rubbing.

The chain doesn't go here. It's the left side of the chainring if you look from the drive side.

Please help me out with the sizing of this frame, it's difficult for me to decide which size would be right for me.

If I choose the size 54, then all the sizes are perfect, but the reach is too long. To compensate this, I would need an 80 mm stem which is very short.

If I choose the size 52, the reach is fine with my originally used 100 mm stem, but the stack would be very low and I would need at least 30–40 mm of spacers, which I think wouldn’t look good.

For reference, I'm 178 cm tall and my inseam is 82 cm.

Which one do you think would be more ideal?

I'm almost like you: 177 cm tall with 82.5 cm inseam. Having read all this thread and the same one on Weightweenies and after lots of doubts, I went for 54. Didn't receive it yet, the frame should arrive in a week or two. I also ordered a really cheap aluminum handlebar to try with different stems and may be get a bikefit before buying an integrated cockpit.

I know that state bicycle does have one for their allroad which is using the same frame: https://www.statebicycle.com/products/carbon-all-road-v2-team-edition

I asked Eddy from Tideace if they have one, and he kindly offered to include it to my order, for free. But it can't be painted.