There's a lot to cover. Why are they advertising "1x13", what does this imply? Are they making a "full" groupset with cassette discs and cranks? Are they locking us into 13 speed now?
The crankset looks like the senicx PR4 but it's not, the back of the cranks is different. Calipers are not the zrace ones and I don't recognize the rotors. The pic is blurry but it looks like the levers are exactly the same

I presume they are advertising "1X13" because it is one more gear than Scumano and SRAM sell on their main product lines.   If my memories are current, Campy is the only one selling 13 cog cassettes.   If you look at the majority of the "Twitter's" complete bicycles sold on Aliexpress, the majority of them are listed with Wheeltop EDS in either 1X13 2X13.    I am sure the product is still configurable for 7 to 13 speeds.  If they are putting a complete kit together to sell to OEM builders, then you might as well go with 13 speeds.

There are 2 different headset bearing designs. One with 45 degree angle and the other being 36 degree angle/chamber.   One really doesn't want to mix and match the different angle bearing to different fork/centering rings.   With the above stated as one possible problem,  gaps are common even when the fork/centering ring and the bearing have the same angles.
(Tolerance stack up.)  Different bearing manufacturers can machine in larger or smaller OD chambers that cause the bearing to sit higher of lower on the fork/centering ring.  The same machining tolerances can happen with the centering ring.   

Almost all of my recent bike builds have a 1-2mm gap. 

Qn for the wheeltop users here. Is it working with the bike computers that you are using?  There are videos showing it working with igpsport and displaying both gearing and battery life.

What about others like Garmin/wahoo/hammerhead?

Does not work with iGPSPORT iGS630.  Tried to get the 630 to be recognized, no go.  Contacted iGSPORT, they said they would add it to the list of software updates.

Given the prince difference between my rotors and what Shimano charges though, there would have to be quite literally a magical difference in performance for me to try Shimano ones.

Ah, The "prince difference" is what matters, his metal version of rotors obviously are not "prince worthy", and sold only to us commoners.

I have a brand new pair I haven't used yer.  Instead, I am using several other brands of  "floating" rotors with aluminum center and steel outer disc.

2 days ago, I swapped out my crank set that uses 50 - 34 chainrings to a new set of cranks with 48-32 chainrings.   I shortened my chain my a link, lowered the front derailleur then performed a new calibration on the app for the front derailleur.   Now that I am very familiar with using the WheelTop app, this process went very smoothly.  I had to re-tune 4 of the rear cogs.   Took the bike out for a 17 mile, 1,500 feet of climbing test ride.   I am becoming used to the shifters and had no "human error" mis shifts.   

The more I ride the EDS TX, the more I like it.  (After about 220 miles on the new kit, plus the shifting during my latest tuning, the front derailleur says 77%, rear derailleur is at 71% battery charge.)

"Planet Cyclery" is going out of business/closing its doors.   (I presume they are another online retailer that didn't manage the past few years very well)

I spent about a 1/2 hour looking at all of their sale prices.  From my perspective, their "sale prices" are still to expensive compared to the deals I get on a regular basis through Aliexpress.

Venting again.   It appears that Aliexpress has changed their shipping details.  I used to see my order's shipping progress all the way to when the item was delivered. Now I see Aliexpress tracking my items until they they depart customs, then they list a shipping number.  I plug these numbers into USPS tracking, and 1/2 the time USPS says the number is not valid, the other half it says the number is registered in the system, but no information is available.  For the past month, all my orders shipping progress is no longer visible or available.

Today,  my wife received 4 notifications from USPS that items are out for delivery.  I input these numbers into USPS tracking and there is no shipping details available. then I was able to match up these numbers with Aliexpress shipping numbers, and it appears that these are 4 of my ordered items.   

On top of this, I ordered a Flyweight carbon rim, on March 18th, that had guaranteed 12 day delivery.  A month+ has passed. I asked the seller if they could tell me where the rim is.  Their answer was: "It has been shipped.  Be patient".   The only tracking information I have is that it shipped April 1st. No tracking number listed.  I filed for a refund and the seller has rejected the claim stating the item has been shipped.   Now I have to wait the complete period of time before Aliexpress will approve the refund and admit that the item is lost.   

To add insult, In the past 6 weeks, I had 5 orders that went past the guaranteed delivery, and I was supposedly given the "One Dollar off" coupons.  Aliexpress lists me as receiving the coupons, but when I've tried to use them, nothing happens and my app locks up.  After about 2 weeks, I can no longer find them.   Something is messed up with their software, or they have figured out a way to not let me use the one dollar off coupons.

EDIT:  May 1st - Aliexpress closed my order for the Fiberin Flyweight and started the refund process.  I have one of these rims and like it. I wanted another but  no longer trust the Fiberlin store because of their lack of communication and that they never provided me with a good tracking number.  Makes me wonder if they ever actually shipped the order.