Current situation
On my garage ceiling there is a light fixture which has been converted via the adapters pictured. It is controlled by a switch which I don't like because I never want to turn off the garage door opener. A voltage tester shows the screws are hot when the switch is on. It was like this when I moved in. So my first question is -- is this safe/proper?
Desired situation
I'd like to convert this fixture to a real receptacle using the cover plate pictured. I'd like the top receptacle to be 'always on' for the garage door opener. I'd still like the bottom receptacle to be controlled by the switch so I can plug in a nearby hanging light.
Here is the wiring situation:
I just wanted to get an idea of how complicated this will be and whether it's a smart and safe upgrade to make. Any feedback would be appreciated!