Don't forget to wrap electrical tape around the edges of the units to cover up the screws. It prevents any accidental short if you happen to touch anything in the wrong way. Makes it especially safe when installing and uninstalling in the future.
I used to just put things in after wiring without a thought for the longest time. Then an old electrician taught me to do this as another added bit of safety.
.. and beautiful job ... love when things like this come together. Hope everything else works out in your project.