Before the Trump tariffs go into effect, I sprung for a LTWOO eGR group set ( the electronic/hydo gravel version with only a rear detailer). I'm replacing 105 derailleur and shifters. I will share some experience and ask some questions. Perhaps we could start a LTWOO discussion group. I ordered from AliExpress and it must have been in a US warehouse, because it arrived in about a week. First issue, install instructions are  down loaded in an app on your phone and it comes up in Chinese, without a hint of how to change language or if an English version even exists. After a while I figured one of the options in the app startup window must be for language, and it was. Second issue, was that the terminology is not very descriptive e.g. 'calibration' means setting the 6th gear position readout to zero. After some messing around I got it to work, and work it does - nice clean shifts up and down cassette. The ability to individually tune each gear is the great advantage - no more messing with the barrel adjuster that tunes all gears the same. I had one issue that the front brake caliper had a stuck piston, but the seller sent me a new one with no questions asked.  Today I was riding and noticed that I had to press the shift button 2-3 times to get a gear change  until finally it stopped shifting altogether - fortunately I was in a middle gear.  I traced it back to the battery wire coming off - it is a flimsy connector so I reinforced it with tape, charged the battery and all is good. This raises the issue of how to get parts or any kind of technical support. The AliExpress seller was responsive, but only because I initially gave him a bad review about the caliper. My final issue is as follows: the only wire connection is from the battery in the seat post to the rear derailleur. The shifters communicate with the derailleur via bluetooth, so how do the shifters get power to talk bluetooth?