It’s winter here still (26F/-3C ) and the Rpi is running cool so I assume the box is cool inside too. I will experiment with implementing an enclosure temp monitoring scheme before our spring/summer (65-75F temps). But yes, I will get a spare splitter. I have a complete replica setup for all except for the splitter for testing.
So this is odd…I noticed the pole (2 x 10’ fence top rails - temporary) was leaning in one direction and I wondered if I could straighten it out by turning it 180 degrees. Did this Saturday afternoon sometime (ET). Look at the improvement in messages. Just by turning the box? Ignore the gap - power went out for some reason.