The grates were a tight fit in a couple that I made.
Originally Posted by Fwismoker
The only thing i can think to try is grinding off a fraction off the outside edge on the grates.
If you had a welder instead of a grinder you would think of something else.
I cut the outer ring between a couple of the longest cross pieces and removed a little material. You can test fit to see how much needs to be removed. My son then welded the outer ring back together and that solved the problem. You can hardly tell that the grate was altered.
If you don't have access to a welder, take the grate to someone who does along with a pound or so of pulled pork, half a slab or ribs or whatever and cultivate a relationship.