The next phase of the test is to power the strip w/100’ (or however much you’re going to need in real life) of power line and test for voltage drop, performance w/ effects, flicker, etc, etc, etc.
BTW, that’s about how hard it should be to get a TxRx pair data line working on your 1st try.
Congratulations, you’ve found a new Rabbit Hole! and welcome to the unverse of WLED 
Well you called it. Still not working. The first two pixels are getting signal then they’re all white. Actually it looks like the first strand and half of the second have low power then the very end has full bright white LEDs. Here’s a pic of the receiver connected to strip. I’ll add another of the overall roof line in the next post.
Are you trying to power those LEDs with cat5/6 wire? You for sure need larger power wire. The cat5/6 wire is to extend the data signal that far not the LED’s power.
No I have a separate power feed line. It’s the black line in the pics. I’m kinda wondering if I have a bad power connection on the front end of the string. There’s just under 2 full strings of LEDs (97/100) and I have power injected at the beginning and end (right and left ends in the last picture), but have about an 85ft cable lead up to the lights. That’s where I added the data line which worked fine in the shop. 
If the 1st 2 pixels have good control from WLED then everything goes white, very possible a bad data connection to pixel #3.
If you’re worried about power issues, reduce the total LEDs to 20 and see if that improves anything (that should drop your power consumption to a reasonable amount). Then start working back up to check the whole thing.
Is a flickering LED bad?
Success! I replaced the first 6 LEDs in the string (after replacing #3-6 and realizing one of the first two were bad 
). Apparently my wire to strip connection wasn’t good or I pulled it apart when I installed it. Anyway, it’s working now. Thanks for all the help!