Just coat it outside the lip should be fine. What's important is that you ensure the cable is firmly plugged in. Personally I would prefer hot glue or liquid tape since that ensures a waterproof seal and yet is easily torn off when needed.

Chain catcher shouldn't be needed. Do note the FD limits are all adjusted in app.

There were only a few issues I had when riding. I seemed to accidentally hit the left shift button inadvertently switching to the small chainring while descending in the drops. Also I didn't like that both left FD buttons functioned the same. I'd prefer to have one button dedicated to the small chainring and the other to the big chainring. Without auto trim, it's hard to hear if the chain is rubbing on the FD or not especially when listening to music. The LTwoo grips are a bit too narrow for my taste, I tend to prefer beefier grips. The LTwoo hydro brake calipers work fine, but they're definitely heavy, I might swap them out later on for some lightweight calipers.

Avoid these cages at all costs. Broke two of these, last one on a cobble section in a race. Pure garbage! Consider yourself warned

In your Video you said, that there is a significant difference between this frame and a higher priced frame.
As someone who rides his Scott CR1 in the last 14 years and doesn’t ride a lot of different road bikes, I can not imagine what the difference is. Would it be possible to elaborate this?

Correct. First impression video and then long-term video per usual. Even if I were to conduct standardized test, I would get called out for doing "bro science" as other YouTuber's have. Thankfully the support of this very forum over the years is what allows me to continue and make content. I'm very grateful.

How's the magene in group rides? Does it go crazy?

Based on the hundreds of messages I received over the years, the typical viewer of my channel isn't looking for VeloBuild to be an equal alternative to one of the major brands. What they want is assurance their money won't be stolen, and that their collarbones won't be broken from a random catastrophic failure. Basically is the frame good enough all things considered. I try to keep my videos light-hearted and sensible. Save engineering and race opinions for the engineers and racers.

Confirmation bias and cognitive dissonance is human nature. Whether VeloBuild or Specialized, we all want to believe we've made the best purchase. No harm in that.