It has got to be pretty close. I have ordered things from the US that have taken longer than that.  I wanted to get the order placed early so that I would be sure to have it before Christmas. I guess I didn't need to sweat that one.

I have 35mm 760mm wide bars on 2 of my bikes. Only one that doesn't is my SS. My plus bike has a rigid fork and I haven't noticed any issues with stiffness. I think they tend to use less material to make them lighter than their 31.8 equivalents as far as width goes. But yes, most of that is personal preference so your results may vary.

Even if paying the $10 shpiiing fee (orders over $100 ship free though) the total is still at least $30 cheaper than any US retailer. I've had good luck finding Easton bars on Amazon in the $100 to $110 price range but nothing ever below $70.

I measured it to be a half inch or 12 to 13 mm's. You should be fine with that setup. You can always put one spacer under the non drive side cup to help with clearance.

Thanks for your answer.

1) The powermeter does add thickness to the crankarm. Should be around 6-7 mm on the inside of the crankarm.
2) The Q-Factor of the X0 crankset is 168mm. The X9 crankset has 171 mm. As I use X0 (right) und X9 (left) I end up with 170 mm. (with a little error in the measurement maybe..)

With the wider q-factor cranks, you should be all set. I can measure the clearance when I get home on Sunday. If you go with the BSA threaded BB, you can put a spacer under the non drive side cup to help a bit too. I run a spacer of sorts (chain guide) under the drive side and everything still clears with plenty of room.

I believe you are correct. One thing that I do like is that AliExpress (AliPay) doesn't release the funds until the seller states that everything is ok. It's probably a little more risk for the seller but as the buyer, it gives a better sense of protection.

Quick update. The frame has shipped already which is 2 days from ordering.

My next build has officially begun. This time for daughter #2, the AR in GKARTA.
I ordered the frame on November 7th and hopefully it's here before Santa as he is the official delivery dude. The frame is sold from a bunch of different vendors but I bought this one from Tideace or Haideli on AliExpress. It's also sold on eBay by Tideace and Dashine bikes and on Amazon by Fasteam. I had several emails with Amy and her communication has been great and she informed me that Tideace and Haideli are the same company but Fasteam and Dashine are different vendors. Here is the link for the frame I purchased.

https://www.aliexpress.com/item/carbon-mountain-bike-frame-with-headset-carbon-mtb-frame-26-size-14-and-16-For-Bike/32530200941.html?spm=2114.13010208.99999999.264.OKUMT2

So on with the build details. The frame will get the household standard of GKARTA decals with a color preference of yellow. The only thing that isn't high on the color list is the white fork. But since it was new from Amazon for $165, white it is. Unless someone has a black Reba 27.5 fork they want to trade for a Revelation RCT3.

Frame: Tideace FM-M001 14" frame 3K weave in matte finish
Fork: RockShox Revelation RCT3 27.5 100mm travel 15mm thru axle
Bar: Chiner carbon flat bar 660 wide
Grips: ESI Racer's Edge yellow
Stem: Wake 40mm
Seatpost: GUB 31.6 straight post
Saddle: Codream 230x140 kids seat from Amazon
Brakes: Shimano Deore M615
Rotors: Avid G3 160mm 6-bolt rotors (painted ones from AliExpress)
Wheels: Stans ZTR Crest 32h, DT Swiss 350 hubs, DT Swiss Competition spokes, Sapim aluminum self locking nipples
Tires: WTB Bronson Race 26x2.1
Crank: SRAM Stylo GXP 1.1 150mm (cut down from 175)
Chainring: 32T N/W gold ring
Bottom Bracket: SRAM GXP BB92
Pedals: Race Face Chester
Shifter: Shimano SLX M7000
Rear Derailleur: Shimano SLX M7000
Cassette: Shimano XT M8000 11-42 11 speed
Chain: Sram NX PC-1110

Weight: no idea but I hope it's in the 23 pound ballpark. 20 lbs would be great but some of the parts are on the portly side so I don't think it's doable with the current budget. I have thought about re-lacing the wheels to some Stan's Crest rims which would drop some weight and gain 1.5mm in inner width but I'm not sure if it's a worthy investment.

I'll keep this thread updated as the parts arrive.