2nd Attempt
Well, I tried again tonight on the upside down grillgrates. Got the surface temperature to 500 degrees before I put them on.
Much better Browning than my 1st attempt. Were juicy too. I was comparing pictures of the second batch to a batch I made on my kamado using a Lodge cast iron pan, I could easily tell that the cast iron is superior for Browning compared to aluminum.
Also, just for Giggles, I tried smashing the burger down on the grill grate. But it did not work too well because of the holes in their grates. It was a mess. Hence the reason why I pre smash them
So lesson learned for Browning. Cast Iron is King
But the advantage to the grillgrates, like I stated before, was I can make all of my burgers at one time. Without doing them in 4 Burger batches.
On a side note, I did flip them right side up early today and cooked 2 pounds of thick-cut bacon. And the recipe called for sprinkling with brown sugar directly on the bacon after the sides brown. It's a Steve Raichlen Recipe from his Project Smoke book and TV show. I doubt I will ever eat bacon the regular way again