Nice clean holes. Even with my crappy drill, they were easy to make, unlike the holes in house walls that are sometimes impossible to do with a cheap impact drill.
Joint installed using some plugs andÂ stainless steel screws.
I put soft foam tape to the joint - brick contactÂ surface to prevent possible vibrations. Those surfaces aren't 100% flat..This is the same kind of stuff car companies use in dashboard and wiring assembly. It's otherwise great, but it's a pain to remove because it's just foam with really sticky glue on it.