There's also a TX-R7101-SGS derailleur mentioned there - TX is for road, but SGS is long cage. It might be that this is a wide-range 2x option.

If it's a 2x gravel electronic groupset, I'm sold. I hate 1x. I prefer riding to the trails which requires doing road miles beforehand. I find driving to a trail just to ride a bike to be incredibly lame. Probably accounts for why most of MTB'ers I see in my area are switching to e-bikes to make up for their lack of fitness!

Just a heads up with the ER9. I found if shifting maybe 3-4 gears without pedaling, you can derail the chain and jam it on the RD cage. I also ended up scruffing up the inner cage plate. I'm way too OCD, so I removed it, sanded it down and repainted the cage matte black with some paint primer.

It does make me wish there were some optional cage replacements in case of major damage.

On the plus side of LTwoo's missteps, it's allowed more Chinese groupset competition to catch up. Wheeltop and soon Magene will also be in the electronic groupset market. I haven't heard anything from Sensah, but if they do make an electronic groupset there will be four potential players. Whoever can step up quality and customer service will own the Chinese cycling market which is on the rise.

I think within the next 3-5 years one of these companies will come out on top. Also that's the number that was thrown around for a Chinese sponsored cycling team to enter the World Tour. That means one of these manufacturers will really need to step up reliability if they want to represent.

Very pretty build (with the exception of that saddle bag !
What frame is that?

It's a TFSA disc frameset (SL6 clone). I believe TFSA is the OEM for the Delihea framesets as well. I initially bought it because it was cheap, but surprisingly it's held up to quite a bit of abuse.

Though if I were to build a new bike I'd probably go with one the Aethos clones floating around. There's just too much climbing in my area!

I had the GR9 hydraulic levers paired with the Zrace XG calipers, design, weight and color choice were attractive at the time.
My experience with the calipers was less than stelar... the back brake did never work, even after several bleeds. The brake feeling was always soft and not very assuring on steep downhill rides. Installed the heavier L-Twoo calipers and breaking feel and performance is now good.

This is funny, I just did the opposite. My LTwoo calipers worked fine, but the weight gain going with the ER9 was bugging me. I had ZRace XG calipers I bought on a whim awhile back and decided to install them. In the process I also opted to switch to 140mm rear rotors and cut a few extra grams. I didn't even do a proper bleed since I did a direct swap with the calipers. Brake feel is surprisingly good with the ER9 levers. The weight savings is quite significant because I cut about 100g from the calipers.

BTW - do you have a photo of your heat shrink cables? I'm using a coat of rubber cement + dielectric grease on my cables, but now I'm realizing it's a bit of a dirt magnet. I'd prefer a much cleaner application if possible!

Do update us on how it goes with those calipers, please.

After I posted this, I ended up switching both my road bikes to a 160/140 Kactus rotor setup with these ZRace XG calipers. I had no problem with the Ltwoo calipers, but they're just heavy. The Kactus rotors have excellent bite (using them on my gravel bike), so I'm presume going to 140mm in the rear shouldn't be an issue for road. I'll be able to see how the ZRace XG/Kactus combo handles on my local mountain descents.

The current batch of Sensah shifters have all the kinks ironed out. I'd go Sensah over LTwoo mechanical any day just so I wouldn't have to fiddle with that dumb Ltwoo thumb shifter.

Saying that, 11 speed Ultegra mechanical is the way to go or pick up 12 speed 105 R7100 hydraulics. They seem to be priced similar.

I'm starting to appreciate 12 speed and the better gear spread you get as you size up on the cassette.

Well, you haven't had it for that long so too early to tell, I'd say.
Mine's also working fine still all the way through a very wet winter here. I'm past 3000k/1800miles now. I too am cautiously optimistic that I might have a well working unit. But so thought SergeK, until they all broke down on him.

I live in one the best climates for cycling so wet and/or cold weather isn't an issue for me. Though I did take all the preventative precautions for the battery cables. If the weather is wet, either I ride an indoor trainer or I take my gravel bike instead. I used the ER9 as an excuse to move to both 12 speed and electronic.

I'll be the first to report back if I have any issues, but I chanced getting the groupset knowing I wouldn't be riding in extreme weather.