I also have the factory spray in bed liner, but I added the mat as well. It is much easier on the knees when you are in the truck bed, and it cushions things you carry. I bought the mat from Ford with my points.
I do usually change the engine oil at 1000 miles when new, but I hadn't done the gear oil or transmission fluid that early. Interesting about finding aluminum shavings in the transmission. I do like the idea of drain plugs on everything
What year and model Ranger are you towing, and approximately how many miles have you flat towed it? 2026 Ranger XLT. I just finished setting it up for flat tow, so only did one tow of 10 miles. I also have a 2025 Ford Escape PHEV and I've flat towed it about 8000 miles with no problem at all...