Yes, I've had dual safety chains (1250lb working load each) that are connected to the trailer and truck from day 1 when I picked up the trailer. I don't cross them as it didn't make any sense with the single wheel setup.
I'll try to pick up an IR gun and measure the tire temp after my first stop on my upcoming trip.
I can say one thing about shaping the radius on the lid...wear eye protection (goggles would've been great) and a filter mask when sanding foam! That stuff got everywhere!
As soon as I git my trailer wired up tomorrow, I'll go on a quick shakedown run to see how well my improvements perform.