• They didn't include a cable stop for mechanical front derailleurs, which they later shipped and delayed my build
• The handlebar/stem was failing to secure properly to the steerer tube which caused it to loosen up while riding (Scary sh*t!). I've built quite a few bikes and I was pretty confident that this wasn't human error, I later took it to a shop and they confirmed it. It was a long back and forth with Yoeleo's customer support that took months! They kept sending small parts for me to try out like the compression plug, steerer tube adapter, and stem bolts which didn't fully fixed the issue, the handlebar still loosened up but not as frequently.
• Since they were dragging their feet and refusing to replace the handlebar I had to take the loss and bought a handlebar from a different brand. I still had to buy an ST1 stem from them (which they offered at a slight discount   ) because the integrated cabling system doesn't play nicely with anything else
• The bike works fine now which proves my point that there was an issue with that particular handlebar/stem. They still refuse to accept that.
• I also discovered that the clamp that holds the saddle together was wearing out internally; The notches that help keep the saddle from rotating had all but disappeared. I asked them to send a replacement along with the other small parts they they were sending and they told me they would but they never did. When I confronted them about it, they blatantly lied and told me that they did ship it. At this point, I just gave up...

VB seems to use the same RD hanger and mount for all of their frames. A 168 owner bought a direct RD hanger from this link which includes the external mount as well https://chinertown.com/index.php/topic,3147.msg53129.html#msg53129